IVY Classic 46112 3/4 x 3-1/2-Inch Forstner Bit, High-Speed Steel, 3/8-Inch Shank, 1/Card Designed to cut clean, smooth pocket holes, angled holes and flat bottom holes in wood and plywood, Swift Bore (Registered Trademark) Tapered rim cuts clean, smooth holes while sharp spur centers and guides the bit Two-cutter design for maximum cutting and chip removal High-speed steel construction with Rockwell Hardness 52-56 Diameter: 3/4-inch, Length: 3-1/2-inch, Shank: 3/8-inch