Ergonomic grip design for comfortable and easy handling The kit comes with EVERYTHING - the main tool, 15 different mandrels that handle both metric (M3 through M12) and SAE sizes (6-32 through 1/2-13), plus 200 assorted rivet nuts so you're ready for any project. The color-coded mandrels make it easy to grab the right size quickly, and the ergonomic grip feels comfortable even during extended use Rivet Nut Setter makes it easy to insert load-bearing threaded rivet nuts in thin gauge materials such as sheet metal, panels, tubes and extrusions as well as castings and housings. Rivet Gun Kit BEETOW 16-Inch Rivet Nut Tool Kit – Includes SAE Metric Rivet Nut Set BEETOW Rivet Nut Tool Set - 16 Inch Hand Nut Riveter With Portable Rivet Tool Compatible with rivet nuts up to Metric: M12, SAE: 1/2-13 The specialized sliding head exerts consistent leverage to expand the rivet nut flange. The easy-to-change mandrel unit comes with mandrels and nosepieces for SAE and metric rivet nuts The 16-inch length provides greater leverage, making riveting easier and more effortless , Easy-to-change mandrel design The specialized sliding head exerts consistent leverage to expand the rivet nut flange.