【Adjustable Hole Distance】-The opening hole distance is from 40mm to 300mm, you can freely control this circular hole saw (the 40mm distance is not marked, adjust the knife to the next one, that is, a distance of 40mm), so you can adjust the hole distance according to your needs. 【Removable Blade】-The blade can be freely disassembled and easily adjusted, and can cut thin or ultra-thin metal plates, which can effectively improve work efficiency. 【Ease of Use】-Very easy to use, suitable for hand drills, vertical drills and other drills. 【Widely Used】-Suitable for decoration, aluminum panels, gypsum boards, plywood and other three-layer thin panels, and the installation of various lamps.