SurPro S2 Interlok Dual Legs Support Aluminum Drywall Stilts 15-23 in. (SUR-S2-1523AP) Unique "Dually" design features two side supports that improve balance and stability Wider and Stronge design and offers stronger components, better balance, and improved mobility wrap-around leg band and wider contoured foot plate offer superior comfort and increased stability Interlok side pole bracket: A must have safety feature that locks pole securely to frame system 1 Year Limited Warranty