"The Phoenix 5/8in. x 5in. V-Belt Pulley is a heavy-duty split steel pulley fabricated from solid steel stock. Replacement for lawn and garden, farm and agricultural, and industrial equipment. U.S.A. Compatible With Outdoor power equipment, Part Type Pulleys, Product Style V-belt pulley, Bore Diameter in. 5/8, Pulley Diameter in. 5, Material Type Split steel. Heavy-duty split steel construction 3/16in. standard shaft keyway size 2 set screws are factory inserted for strength"