Greenlee 645-4-1/2 4-1/2 Quick-Change Carbide-Tipped Hole Cutter

Using the Greenlee 645-4-1/2 hole cutter is a breeze. First, if you haven't already, attach the 645-002 pilot drill (sold separately) to the cutter. You can easily switch between different cutting head sizes by simply pushing and turning - no need to re - chuck. When starting to cut, place the cutter on the material you want to drill (it works great on stainless steel, mild steel, aluminum, and more). The step - designed pilot drill will help you cut quickly and accurately with less force. Remember, since it has a flange stop, it'll prevent you from over - drilling. After cutting, the slug ejector spring will make it easy to remove the slug. As for maintenance, keep the tungsten carbide teeth clean. You don't need to use oil, which makes it more convenient. Also, store it in a dry place to prevent rust and damage. And always double - check that the pilot drill is properly attached before each use for safe and effective operation.