The Barton Size 5 Double Block – Fixed Eye / Becket N05211 is designed for larger cruising and racing yachts with nylon sheaves suitable for all ropes, including braided dyneema. Newly designed for 2019 onwards, the Barton Blocks are known as great value for money and practical for many applications. For racing applications, consider getting the ball bearing versions.Barton Size 5 Blocks are high-load cruiser blocks of rugged construction, featuring injection moulded side plates with all load-carrying components from 316 grade stainless steel. Side plates are through-bolted and riveted for added strength and security.SpecificationsBrand: BartonWeight: 274 gDimensions: 131 59 58 mmSize: 5 (54 mm)Block Type: Fixed Eye + BecketNumber of Sheaves: DoubleBearing Type: PlainSheave Size: 54 mm 17 mm (2 1/8″ 5/8″)Maximum Rope Diameter: 12 mm (7/16″)Safe Working Load (SWL): 750 kg (1,650 lbs)Breaking Load: 1,500 kg (3,300 lbs)Max Rolling Load (Ball Bearing Blocks): 525 kg (1,157 lbs)