The Carbo Ratchamatic® is a load-sensing ratchet block that rolls freely in both directions under low loads and automatically engages the ratchet as loads increase. Shifting between ratchet and light-air modes is seamless. Sheave Ø (mm)57 mm Length (mm)83 mm Weight (g)89 g Maximum line Ø (mm)10 mm Fasteners (mm)M4 mm Maximum working load (kg)227 kg Breaking load (kg)907 kg Holding power w/180 degree wrap 50 lb (23 kg) 10:1  FootnoteIncludes fasteners and mounting pad.