This stainless steel bolt kit includes everything you need to secure your bumper/Nerf bar to your micro sprint race car. In this set are: (12) 10-32 X 1-1/4" long bolts and (12) lock nuts. For micro nerf bars and bumpers. (12) 10-32 x 1-1/4", (12) locknuts. Stainless steel. Socket ends.