With the Bahco 3830-20-VIP Sandflex bi-metal holesaw, you cut clean 20 mm diameter holes through wood, plastic, non-ferrous metals, and steel, including stainless steel. Featuring a tough bi-metal construction with 8% cobalt, it resists tooth wear and stripping during demanding conduit routing and control cabinet installations. a maximum cutting depth of 38 mm lets you power through standard material thicknesses with ease. Built-in side knockout holes make removing the cut core fast and effortless after every drill cycle. Equipped with an internal thread for mounting on compatible arbors, this holesaw comes supplied in a cardboard box.