Swivel Pulley is made of Non-magnetic stainless steel body and strap with plastic sheave for wire rope tiller lines. The pulley strap is included. Meets ABYC Standard P-18. Swivel pulley rotates 360° on vertical axis. Open eye design for easy installation. Simply mount the strap and attach the pulley. Shrouded body design keeps tiller line in sheave track. Strap is predrilled with two mounting holes to accommodate 10 screws of length 4 inch, Pulley rotates 360 Degree and 2 inch groove diameter of sheave.