The 10″ Aluminum Die-Cast Hoist Pulley is made from an aluminum die-casting process. Used on BH-USA Flat Plate hoists for more than 15 years. The design is much stronger in marine environments. Won’t swell or bend. Belt-gripping technology featured on the inside of the pulley helps eliminate belt slippage. Fits any known flat-plate hoists. Warping resistant. Deeper fit for drive belts. .750″ bore. Accepts up to 1/2″ drive belt. Made by BH-USA.