Not all Wing Bolts used on stilts are created equal.  Our customers love that we use special stop/spring washers on each of our Wing Bolts to ensure a secure fit without damaging the main body, or loosening over time.  We are the originators of the "Double Wing Bolt System", and each individual stilt we offer uses two wing bolts on the front, and two wing bolts on the back - 4 per stilt/8 total Wing Bolts per pair of stilts (except sizes 15"-23" and 16"-24" stilts, which use 2 per stilt/4 total Wing Bolts per pair).   This kit includes 4 total Wing Bolts, each with a washer.  If you want to replace all of your Wing Bolts on stilts utilizing our "Double Wing Bolt" system (all stilts sized 18"-30", 20"-30", 21"-31", 24"-40" or 26"-40", regardless of model), you will need to order a quantity of two (8 Wing Bolts).  For sizes 15"-23" and 16"-24" stilts, you will only need to order a quantity of one (4 Wing Bolts).