Boss MSC05076 Spring Kit, Smarthitch T GREAT QUALITY. SuperBearPower swing strap are the same quality and strength as seat belts. Holds up to 1000 lbs. It has a double box stitch which makes it much stronger. EASY INSTALLATION. Strap can be installed in under 5 minutes. No drilling or tools needed. 100% MONEY BACK GUARANTEE. We offer a 100% money-back guarantee within 60 days of payment. SAFETY. To prevent the straps from coming off while swinging, we designed our carabiners to include a heavy duty screw lock. PORTABLE. Super Bear Power Strap Kit are easily portable - taking them down is as easy as putting them up - take them with you camping, back packing, to the park, to school, wherever.