Minimizer Fast Flap secure mud flaps without creating any holes in the flap or sacrificing strength. It takes more than 500 pounds of pressure to detach a mud flap from the Fast Flaps stainless steel bar, and the result doesn t damage the flap. Made from stainless steel, heat tempered to spring steelA screwdriver (minimum length of 10″) pries the Fast Flaps bar apart to allow you to insert the mud flap into the gapOne Fast Flap kit includes everything you need to mount two mud flapsMud flaps not included