Pulley Block Product Type Pulley Block Pulley Type Swivel Mount Type Not Applicable Working Load Limit 3 300 lb Operation Pulling Attachment Type Shackle Compatible Rope Diameter 9/16 in Sheave Inside Diameter 2 1/4 in Sheave Depth 3/4 in Sheave Outside Diameter 3 in Compatible Rope Type Wire Rope Bearing Type Ball Attachment Inside Diameter 5/8 in Housing Material 316 Stainless Steel Mounting Hole Diameter Not Applicable Number of Grooves 1 Sheave Material Aluminum