Pulley Block Product Type Pulley Block Pulley Type Swivel Mount Type Upright Mount Working Load Limit 525 lb Operation Pulling Attachment Type Swivel Hook Compatible Rope Diameter 3/16 in Sheave Inside Diameter 1 in Sheave Depth 7/16 in Sheave Outside Diameter 1 1/2 in Compatible Rope Type Wire Rope Bearing Type Sleeve Attachment Inside Diameter 11/32 in Housing Material Carbon Steel Mounting Hole Diameter 5/16 in Number of Grooves 1 Sheave Material Steel