HammerFab has developed these 3D Printed dies for dimpling sheet metal to create a unique detail in a panel. They are optimized for 18ga mild steel but work well with softer metals as well such as aluminum, copper, and galvanized steel. Drill or punch a 3/8" hole in your panel, then use a 3/8" bolt and nut with an impact driver to compress them together. Anti-seize is recommended to prevent the dies from galling and sticking to the panel. For more information on our products, please visit www.hammerfab.com.