AS TOOL CENTER 12.7mm Square Hole Drill Bit, 1/2" High-Carbon Steel Hollow Chisel Mortise Power Tool for Woodworking

Square Hole Drill Bit --- Chisel Side Width: 12.7mm / 0.5 inch, Chisel Depth: 73mm / 2.9 inch, Holder Diameter: 19mm / 0.7 inch, Shank Diameter: 9.8mm / 0.4 inch, Total Length: 210mm / 8.3 inch. ? Wide Application --- To be used with mortise and tenon machine with double effect, electric drill, hammer and other tools, can easily punch square holes in wood. ? Ease of Use --- This square hole drill bit can drill fast with the drilling point tip and 4 cutting corners, to enable the penetration into working pieces of wood very smoothly. ? High Carbon Steel --- Made of High-carbon steel with heat processing, has the character of high hardness (48-50 HRC). The sharp-edged square chisel is durable and lasts long. ? Useful Tips --- Please install the square chisel bit in the square hole machine properly, or it will only be processed into round holes and cannot be processed into square holes.