Swivel Single Pulley 1/2 Inch Nickel Plated Die Cast Body. Designed for use with rope or cord in indoor and outdoor applications. Swivel eye eliminates tangling. Sheave rolls smoothly. Can be rigged as a block and tackle to reduce line pull. No-rust copper-nickel plated zinc die-cast body with solid brass sheave.. Safe working load is 9 pounds. Maximum rope size is 3/16 Inch.