1pc 12-20mm HSS Drill Cutter Carpentry Hand Tools for Metal Iron Alloy Hole Opener DIY Wood Cutting JigFunction: Quickly and accurately cut holes on steel, stainless steel, iron, copper, brass, aluminum, fiberglass, formica and other laminates. It is very suitable for installing locks and knobs on doors and cabinets, or drilling larger diameter holes on tables. It can be used as a radar system to drill parking sensors for cars, buses, and trucks. Provide a variety of cutters to meet your professional needs. Specification:Material: High Speed Steel Size(Outer Diameter): 12/13/14/15/16/17/18/19/20 (mm)Application: Metal Hole Opener, which can be used to open holes in thin metals, iron plates, channel steel, aluminum alloys and other metals. Instructions for use: When drilling, the hole opener should touch the workpiece slowly, not hit the workpiece, and the speed should be low (the larger the hole, the lower the speed). Add coolant or water if necessary. If you want to drill, pay attention to slow down the feed speed. The material to be cut must be fixed and must not be moved. It should be at right angles of 90 degrees to the hole. When positioning the drilling rig, wait for a while, and then drill slowly. During the operation, if there is any abnormality or the troubleshooting does not meet the requirements, please stop working and cut off the power. When tightening up and down, do not use excessive force to avoid tightening the screws. It can be used for pistol drills, bench drills, magnetic drills, air drills and other drills. Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.1 x Drill Bit Cutter