The ARB45 45mm Auto-Ratchet Block from Selden is perfect for dinghy mainsheet use. The auto ratchet function makes it easier to haul in the sail when under load and it makes lighter work of holding the sheet - the perfect combination of control and convenience.
Features:
ÌÎÌ_ÌÎ_ÌÎÌ__5 mm Delrin ball bearings and ÌÎÌ_ÌÎ_ÌÎÌ__45 mm aluminium sheave.
The sheave automatically changes from free-turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in. The switch-over point is set using an allen key to adjust a screw inside the sheave. Fast, simple, precise.
The shackle can be locked in-line with the sheave or at 90_. It can also be set to swivel freely.