LIFETIME WARRANTY! Our products are made of 100% high impact ABS material while other inferior swivels are made of a softer Polypropylene which is so much softer (and less expensive) than ABS that heavy items will dent them and they eventually will no longer turn smoothly. We have tested our ABS swivels through 10,000 operation with varying weight loads and they have never shown any wear or denting by the ball bearings regardless of the amount of weight loaded onto them. Non-skid, non-scratch rubber pads. Steel ball bearing quality 0.8" Thin Profile. Need a cushioned, no-slip pad? Search for SWV-NOSLIP-10