The Barton Size 3 Single Snap Shackle Becket & Cam Block is designed for small to mid range vessels and come 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 3 Blocks are suitable as mainsheet, vang or lead blocks for smaller dinghies including Laser, Topper and Optimist boats.SpecificationsDiameter: 10mmBreak load: 800KgMax rolling load: 270kgSheave Diameter: 45mm x 13mmWeight: 200gLength: 124mmDownloadFactsheet .input-wrapper a { text-decoration: none; / Removes underline / background-color: transparent; / Ensures no background color / } .input-wrapper a:hover { text-decoration: underline; / Adds underline on hover / background-color: transparent !important; / Removes grey highlight / }