Tarantula TCT hole saws cut 10x faster and make up to 50x more cuts than standard bi-metal hole saws Cut steel, stainless steel, wood with nails, plastics/PVC, non-ferrous metals, fiber cement board, fiberglass, mineral fiber, and more Compatible with rapid Core Eject Arbor System lets you eject cores without prying, quickly change diameter, cut at an angle, and enlarge existing holes Universal thread uses Spyder arbor pilot bits or other universal hole saw arbors Maximum cut depth of 2-3/8-inch