Tonsiki 4pcs 5/64", 7/64", 9/64", 11/64" HSS Hex Shank Door Self-centering Hole Hinge Centering Drill Bit Set Twist Woodworking Hole Saw for Carpenters, Cabinet and Furniture Makers Size:5/64",7/64'', 9/64'', and 11/64'' Material: brass, high speed steel, outer plating. Sawdust will be automatically discharged from the top of the drill holes on both sides, not stuck drill. 4 popular sizes used for carpenters, cabinet, furniture makers and other wood working trades Drill bush for precise positioning, will not shift,easy to use and install, change bits fast which one-handed load and release,hex shank fits all quick change chucks like those found of 1/4 Hex Shank impacts