The nylon resin sideplates are densely packed with long-glass fibers for a compact block with a high strength-to-weight ratio. Ball bearings, sheave and sideplates are UV stabilized with black additive for maximum protection. Blocks feature Cam-Lock or U-Lock locking systems to lock the shackle in front or side positions, or swivel to keep line from twisting. Carbo fiddle line features high-load ball bearings with fitted races for low-friction operation. The 40 mm fiddle is an excellent choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets, as well as for controls such as cunninghams and internal boom outhauls on larger boats.
Cam-Lock locking system
Switch allows the jaw to lock at 90-degree intervals, or to swivel freely
Precise on/off control with accessible, easy-to-operate on/off switches on both sides of the block