A standard swivel with ball bearings and a low friction coefficient Available in two sizes, the Petzl SWIVEL prevents the rope twisting when the load rotates. The sealed ball bearings provide excellent performance and reliability. Detailed Description: It prevents the rope twisting when the load rotates The sealed ball bearings provide excellent performance and reliability. SWIVEL S: It is suitable for single person loads Compact SWIVEL L: It is suitable for a two person load and offers the possibility of attaching up to 3 carabiners.