Sailing - Blocks

245 products


  • Sale -12% Harken 57mm Carbo Block Flip Flop w/Cam [2143]

    Harken 57mm Carbo Block Flip Flop w/Cam [2143]

    6 in stock

    57mm Carbo Block Flip Flop with CamSmall Boat Flip-Flop blocks pivot around the line axis to keep the line close to the deck. Hinged construction allows for various lead angles.Features: Sheave Ø (mm) 57 mm Sheave Ø (in) 2 1/4 in Maximum line Ø (mm) 10 mm Maximum line Ø (in) 3/8 in Maximum working load (kg) 136 kg Maximum working load (lb) 300 lb

    6 in stock

    $364.50$320.95

  • Sale -15%Last stock! Ronstan Series 20 Ball Bearing Block - Triple - Becket - 2-Axis Shackle Head [RF20312]

    Ronstan Series 20 Ball Bearing Block - Triple - Becket - 2-Axis Shackle Head [RF20312]

    3 in stock

    Series 20 Ball Bearing Block - Triple - Becket - 2-Axis Shackle HeadFeatures: Low friction High static and dynamic load capacity Lightweight Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction Two-Way head can be fixed at 0° or 90° Applications: Dinghy control lines Dinghy vangs Cunninghams Traveller controls Materials: Stainless steel ball bearings UV Stabilized Acetal sheave Grade 316 stainless steel load strap and head fitting Impact and UV resistant, fiber reinforced Nylon cheeks Specifications:Sheave Ø: 20mm(3/4")Max. Rope Ø: 6mm(1/4")PinØ: 4mm(5/32")M.W.L.: 400kg(880lbs)B. L.: 850kg(1,870lbs)Weight: 64g(2.3oz)

    3 in stock

    $58.79$49.97

  • Sale -46%Last stock! SeaSure Seddon Link f/25mm Diameter [08.05CRD]

    SeaSure Seddon Link f/25mm Diameter [08.05CRD]

    1 in stock

    Seddon Link for 25mm DiameterThe "Life Line Link" is a webbing link that you are easily able to move around the boat to create a safe attachment point. Fitted and removed in seconds, it provides strong attachments for deck safety lines or sheet locks. Features:Fits a 25mm Diameter tubeSpecifications:Weight: 0.1kg

    1 in stock

    $78.45$42.50

  • Sale -15% Ronstan Series 40 Orbit BB Quin Block w/Swivel Shackle [RF48500]

    Ronstan Series 40 Orbit BB Quin Block w/Swivel Shackle [RF48500]

    6 in stock

    Series 40 Orbit BB Quin Block with Swivel ShackleThe Series 40 ball-bearing Orbit Blocks™ provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.Series 40 Orbit Blocks™ are fitted with our carbon-reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave & hub together with a triple bearing race to maintain low friction at very high loads.Features: Class-leading dynamic and static load ratings Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks Low friction 2-stage ball bearing system for efficient and effortless trimming Soft attachment, lashing and traditional swivel shackle head options Low profile and compact High performance cleating Applications Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft) Halyard, vang and backstay applications on boats to 9m (30ft) Control line applications on larger yachts Specifications: Sheave Ø: 1-9/16 in. Max. Rope Ø: 3/8 in. Pin Ø: 5/32" M.W.L.: 1320 lb. B. L.: 2650 lb. Weight: 8.5 oz.

    6 in stock

    $242.03$205.73

  • Sale -15%Last stock! Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing [RF35109HL]

    Ronstan Series 30 Ball Bearing Block Single Becket Option Lashing [RF35109HL]

    5 in stock

    Series 30 Ball Bearing Block Single Becket Option LashingBall Bearing Blocks™ boast the highest strength-to-weight ratio available.  This is achieved through all-composite reinforced polymer materials and multiple attachment options. Their precision design provides the optimum number of ball bearings for minimum friction while weight reduction is achieved through the use of fibre-reinforced composites in the block head, cleat arms and beckets. Highest Working Load in its ClassThe proven Ronstan 2-stage bearing system (Series 30 and larger) features high compression grade Acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.The sheave and bearing system is supported by a fibre-reinforced load frame, computer modelled and optimised using advanced stress analysis methods. The Dyneema® Link, used in multi-sheave blocks, is produced from high spec SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point. Simple, Versatile & Secure AttachmentThe single block is easily lashed to an attachment point, and can also accept Dyneema® Links and shackles for a variety of efficient attachment alternatives. The Dyneema® Link used in multi-sheave blocks is easily fitted and secured by a removable pin. The Dyneema® Link can also be removed and replaced by a shackle, custom lashing or strop.These blocks are far more compatible with Dyneema®/Spectra® lines, carbon laminate connection points and webbing than traditional blocks with steel loop tops or shackles.Low Profile & CompactThe two way head in the single lashing block allows for alignment at 0° or 90° orientation, while the single swivel block allows for full articulation.The flexible Dyneema® Link used in multi-sheave blocks provides 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post. This reduces weight and gives the lowest possible profile while allowing full articulation. Beckets have been carefully designed to minimise height.Features: Lightweight Highest working load in its class Secure, versatile and secure attachement Low profile and compact Ultra low profile thru-sheave becket Self-lubricating Nylatron® sheave and full contact bearing for high dynamic loads Applications: Mainsheet systems and spinnaker sheets on dinghies to 5M(16') Halyard, vang and backstay applications on boats to 5M(16') Control line applications on larger yachts

    5 in stock

    $128.47$109.20

  • Sale -11%Last stock! Ronstan Series 30 Utility Block - Single, Becket, Loop Head [RF681]

    Ronstan Series 30 Utility Block - Single, Becket, Loop Head [RF681]

    4 in stock

    Series 30 Utility Block - Single, Becket, Loop HeadFeatures: Lightweight durable construction Economical Maintenance free Product Information:Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters etc on larger yachts Materials: U.V. stabilized Acetal sheaves Grade 316 stainless steel cheeks

    4 in stock

    $22.91$20.50

  • Sale -15% Ronstan Series 15 Ball Bearing Utility Block - Pivoting Lead Block [RF15174]

    Ronstan Series 15 Ball Bearing Utility Block - Pivoting Lead Block [RF15174]

    8 in stock

    Series 15 Ball Bearing Utility Block - Pivoting Lead BlockFeatures: Smallest and lightest ball bearing block available Precision molded acetal sheave running on stainless steel ball bearings provide high performance & low friction Single loop head blocks include an O-ring to separate running line from head lashing or fixing Featuring a 4-point fastening for load distribution and low profile. Can be mounted without disassembly.Applications: Dinghy control lines Vangs, cunninghams and tweakers Shock cord tensioning systems Materials: BB sheaves: UV stabilized acetal Ball bearings: Stainless steel Cheeks: Grade 316 stainless steel

    8 in stock

    $47.46$40.34

  • Sale -15% Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200]

    Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200]

    7 in stock

    Series 40 Ball Bearing Block - Double - Swivel HeadFeatures: Low friction Acetal or Torlon® bearing system Lightweight Cheek cut-outs for easy bearing maintenance Features a swivel shackle head for full 360° rotation Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Applications: Mainsheet Halyard Vang Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)

    7 in stock

    $87.84$74.66

  • Sale -15%Last stock! Ronstan Nylatron Sheave Box - Single Upright Lead Block [RF453]

    Ronstan Nylatron Sheave Box - Single Upright Lead Block [RF453]

    1 in stock

    Nylatron Sheave Box - Single Upright Lead BlockLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, are frequently used as upright leads.Features:The external tabs can be formed to fit the spar profile before fasteningApplications:Typically used in dinghy spars for control lines such as outhaulsMaterials: Nylatron® sheave Grade 316 stainless steel load housing Specifications:Sheave Ø: 22mm(7/8")Max. Rope Ø: 3mm(1/8")Max. Cable Ø: 3mm(1/8")Fastener Ø: 5mm(3/16")M.W.L.: 160kg(350lbs)B. L.: 350kg(700lbs)Weight: 30g(1.1oz)

    1 in stock

    $37.93$32.24

  • Sale -15% Ronstan Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head [RF30100]

    Ronstan Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head [RF30100]

    9 in stock

    Series 30 Utility Ball Bearing Block - Single, Swivel Shackle HeadFeatures: Low friction 2-stage ball bearing system provides consistent performance over the full working load range. High static and dynamic load capacity. Light weight Versatile head fittings Product Information:Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Can be fitted with a shackle in either of two planes to allow correct alignment of the block.Applications: Primary lead blocks on dinghies and catamarans Control lines on larger yachts Materials: U.V. stabilized Acetal sheaves Acetal ball bearings Impact modified, fiber reinforced and U.V. stabilized Nylon cheeks Grade 316 stainless steel load straps and head fittings

    9 in stock

    $38.24$32.50

  • Sale -15% Ronstan Series 50 All Purpose Block - Fiddle - Becket [RF51510]

    Ronstan Series 50 All Purpose Block - Fiddle - Becket [RF51510]

    8 in stock

    Series 50 All Purpose Block - Fiddle - BecketFeatures: Exceptionally high working loads Low maintenance, long service life Self-lubricating Acetal polymer sheave ensures low friction and extreme durability Captive Lock™ universal head Slotted pin shackle eliminates fouled lines Snap fit removable becket pin Spare Parts - RF51010 Replacement Becket Pin, RF150 Shackle All purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required. Becket pin is removable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or toolsApplications: Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft) S60 - on boats up to 12m (40ft) Ideal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems. Materials: Grade 316 stainless steel load strap Impact and UV resistant, fiber reinforced Nylon cheeks

    8 in stock

    $89.27$75.88

  • Sale -15% Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]

    Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]

    7 in stock

    Series 40 Ball Bearing Block - Single Upright LeadLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Applications:Typically used for halyards at the mast base.Materials: Acetal ball bearings UV stabilized Acetal sheave Grade 316 stainless steel load housing

    7 in stock

    $66.94$56.90

© 2026 Safe Water, Powered by Safe Water

    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Visa

    Login

    Forgot your password?

    Don't have an account yet?
    Create account