Ergonomically designed for one-handed operation, this riveter's self-adjusting jaws help set rivets ly in a single stroke. You can also set all sizes of rivets without having to remove the nosepiece. The tool ensemble comes with 40 polyoxymethylene (POM) rivets that leave an attractive, finished appearance.Ergonomically designed for one-handed operation Provides easy access to confined areasSets all sizes without having to change the nosepiece Will not cause damage to painted or delicate surfacesncludes 40 industrial strength polyoxymethylene (POM) rivets: 10 each of 5mm x 15.8mm, 5mm x 17.2mm, 6.6mm x 17.2mm, and 6.3mm x 25.2mm for fastening door panels and automotive trim Rivet leaves an attractive, finished appearance