Our Diamond Snatch Blocks are sheaves in which the cheeks can swivel, allowing the user to place the snatch block on a cable already in place. Diamond snatch blocks are secured with a supplied stainless steel black passivated shackle. 3/16in. diamond snatch block, 700 lbs. working load. 'j' diamond snatch block, 1,400 lbs. working load. Both use Mil Spec anodized aluminum aircraft pulleys. Cheeks are CNC milled from 6061T6 aluminum billets and are anodized black.