Double Rope Clutch. Max Rope Diameter Up 12mm 0.47 . Fastening 6mm x 4 0.24 x 4 . SWL 550kg 1,212.54lbs . The Barton D0550 clutch is designed for cruising and racing yachts. Manufactured from modern lightweight materials to withstand the harsh marine environment. Moulded parts are from high grade plastics which are strong, light and impact-resistant. Cams and bases are from marine grade aluminium, 'Spectro' anodised for high wear resistance and long life. The true clutch mechanism allows line to be adjusted through the unit in the closed, locked position with minimal slippage. Released under load is positive and requires little effort. The mechanism's opening and closing action is precise and easy to operate, even with cold wet hands. A positive handle lock in the closed position is also featured. A unique feature of this design is the removable insert on the top face of the handle. Pop this out and you can easily replace with printed coloured inserts to denote at a glance the f Max Rope Diameter Up 12mm 0.47 . Fastening 6mm x 4 0.24 x 4 The true clutch mechanism allows line to be adjusted through the unit in the closed, locked position