8mm deep groove lock, more stable and safe, Cushion with top pocket design&4 tie straps, antislip, 40mm thick steel pipe, firm and safe, A buckle to the tripod, stable the cup holder, Double-layer fab

Suteck Oversized Zero Gravity Chair, 33In XXL Lounge Chair w/Removable Cushion & Headrest, Upgraded Aluminum Alloy Lock, Cup Holder and Footrest Patio Reclining Chair for Indoor Outdoor, 500lbs,Black