Zinc plated medium duty swivel eye snatch block, forged eye with 4" diameter single sheave grooved for 3/8" 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: 1700 lbs. Weight: 3.6 lbs. Ultimate block strength is 4 times the working load limit.