Sheave Diam. 2 5/32 in. Max. Rope Diam. 3/8 in. Max. Wire Diam. - in. Pin Diam. - in. Max. Working Load 550 lb Breaking Load 1650 lb Weight 7.2 oz * Total block load. Maximum MWL load on becket not to exceed 41% of block load. Ie. 103kg (227lb), BL 206kg (453lb). Equates to block MWL in 2:1 system. Attachment of an additional block, to the becket must not exceed the becket M.W.L. Attachment of a shackle to the becket will reduce the M.W.L. due to the point loading affect. ** This block has full Automatic ratchet engagement only. ie. No On/Off manual mode operation