Carbo Ratchets allow sailors to hand-hold loaded lines and offer balance between holding power and controlled easing. On/off switch operates from both sides. Standard grip: medium/light air; 10:1 holding power Sheave Ø (mm)57 mm Length (mm)103 mm Weight (g)85 g Shackle pin Ø (mm)5 mm Maximum line Ø (mm)10 mm Maximum working load (kg)227 kg Breaking load (kg)907 kg Sheave facet count: 8 Also available in 2 other options (Titanium and Silver) of faceted holding power to best take advantage of the day's wind and wave conditions. These blocks are the popular choice for Laser, Topper and Optimist Mainsheets.