LENOX CARBIDE HOLE CUTTERS LENOX Accurate, burr-free holes. Precision ground carbide teeth for fast cutting of clean, round holes. WILL NOT DAMAGE WORK. Over-drill stopper prevents the tool from penetrating beyond the hole. Starts on contact. Split point pilot bit for faster penetration and less walking. Hole Size: 7/8" & 22.2 mm, Conduit & Pipe Size: 1/2", Ctn. Qty.: 1