The RT200M riveter is perfect for projects involving sheet metal, gutters, storm doors, and automotive repairs. This easy-to-use rivet gun tool belongs in the toolbox of any professional or serious DIY-er. Convenient design - the headless riveting design automatically adjusts to fit three rivet sizes, eliminating the need to swap threaded heads for different rivets, this saves time on general-purpose rivet tasks, such as gutters, furniture, and canvas works dynamic and easy to use - the compact, one-handed operation of this rivet tool allows freedom to hold materials while fastening, the anti-slip handle ensures secure gripping and control while fastening choose the right rivets, the RT200M works with aluminum or steel arrow rivets (sold separately) in 1/8-inch, 3/16-inch, and 5/16-inch.