The drill sleeve adopts U-shaped design, which facilitates the discharge of sawdust and improves drilling efficiency. Drilling a hole requires the use of a drill, hammer, or other tool. ArtisanShow 6PCS High Speed Steel Woodworking Square Hole Mortise Drill... High hardness and long service life. SET OF 7: There are 7 drill bits in total, the specifications are 1/4in 5/16in 3/8in 2/5in 1/2in 9/16in 5/8in for you to choose and use, these hole drill bits are well-made and accurate in size, can be Perfectly matched to the motor. MLCS Self-Centering Hinge Drill Bits - 7 pc Set Tenon Cutters For Wood Sunkizzrs® High Speed Steel Square Hole Saw Mortising Chisel (Pack Of 1 Mortising Bit HSS MATERIAL: These bits are made of high speed steel material, heat-treated, with high hardness bit and sharp chisel, long service life. Universal® Six-Section Classification Folders, Heavy-Duty Pressboard Cover, 2 Dividers, 6 Fasteners, Letter Size, Light Green, 20/Box ;. UNV10407. $31.15/BX WIDE RANGE OF USES: The drill bit is very suitable for use with the tenon and tenon machine to drill holes in wood.