Winch Installation Kit by ARB. ARB snatch blocks feature side plates that snug against the pulley, eliminating the possibility of the winch cable becoming trapped between the pulley and side plates. The groove on the pulley itself tapers down to the allowing for a variety of cable sizes (1/4″-1/2″) to be used and ensures the cable is seated securely in the pulley, minimizing lateral movement, to ensure smooth pulley operation, the hardened steel pin fitted a nipple, to which grease can be periodically applied.