Zinc plated regular duty swivel hook block, forged hook, no latch with 2-1/2" diameter single sheave grooved for 1/4" cable. Equipped with oil impregnated bronze bushings for longer service life. We recommend oiling the bushings occasionally if subjected to heavy use. Working Load Limit: 685 lbs. Weight: 1 lb. Ultimate block strength is 4 times the working load limit.