Allen 40mm single switchable ratchet

These blocks have a ratchet mechanism that can easily be switched on or off even under load and the swivel head can be locked in a fixed position, only 50& 60mm ratchet block. Allen sheave technology gives you grip under load and easy release when the load is decreased. The cheek block allows port or starboard deck mounting. The 50mm switchable ratchet block is ideal for sailors wanting to reduce the size without losing the inherent strength of this design.