The set includes two bolts and is engineered as a direct replacement for OEM parts , suitabel for select model equipment , and multiple lawns tractors models This stainless steel deck belt tension spring ( GX20377 / GX21582 ) ensures durability and precise tension control Manufactured with high grade stainless steel to resist rust and , this heavy duty spring maintains consistent tension through extreme vibrations and prolonged outdoor use Essential for restoring optimal deck belt during seasonal maintenance , replacements , or repairs on residential / commercial lawns equipment Designed for equipment owners and technicians maintaining series mowers , lawns tractors , or commercial grade cutting decks, Manufacturer: Zqxnt