Neo-Chrome Aluminum Quick Release Fasteners Kit For Bumper & Trunk Hatch Includes 4 quick releases, 4 aluminum washers, 4 nuts, 4 stainless bolts, 2 O rings. Anodized aluminum for a long lasting custom colored look. Sickspeed is proudly displayed on the face of each quick release mechanism. Fastner has a diameter of 24mm. Great for securing your bumper, fender or trunk for when you need an easy removal option.