The Auto-ratchet is a load-sensing ratchet block that rolls freely in both directions under low loads, and automatically engages the ratchet as loads increase. 

Unloaded main and jib sheets run out freely during mark roundings.

SENSITIVE LOAD RATCHET 60 mm SHEAVE DIAMETER BLOCK.

WORKING LOAD 500 LBS
BREAKING LOAD 1450 LBS
ROPE MAX 3/8" ( 10 MM)
WEIGHT 13 OZ
SHEAVE DIAMETER 60 MM