1. MULTIPLE SPECIFICATIONS: Package includes 7 x 3 point countersink bits, 8 x wood plug cutters, 6 x countersink bits, 1 x L wrench and 1 x wood center punch. 2. BRASS AND STAINLESS STEEL: These drill bits are made of stainless steel and brass materials, which are hard and wear , not easily deformed and have a long service life. 3. FOR HIGH SPEED TOOL: When using a drill bit for drilling, the the power tool rotates, the better the hole will be. 4. CONVENIENT TO USE: The installation method of the hole drilling bit is very simple, which greatly improves the work efficiency and is a very practical tool. 5. WIDE APPLICATION: Our woodworking chamfering drilling tools can be mounted on electric drills, hand drills, table drills, etc. for a wide range of applications. Specification: Item Type: Hole Drilling Bit Set Material: Stainless steel, brass Wood Plug Cutter Specification: Approx. 12mm / 0.47in, 14mm / 0.55in, 19mm / 0.75in, 22mm / 0.87in, 10mm / 0.39in, 14mm / 0.55in, 17mm / 0.67in, 20mm / 0.79in Wood Plug Cutter Shank Size: Approx. 10mm / 0.39in, 9.5mm / 0.37in 1/4in Hex Countersink Drill Bit Specification: Approx. 6mm / 0.24in, 8mm / 0.31in, 9mm / 0.35in, 12mm / 0.47in, 16mm / 0.63in, 19mm / 0.75in 1/4in Hex Countersink Drill Bit Shank Size: Approx. 7mm / 0.3in 3/8in Round Shank Countersink Drill Bit Shank Size: Approx. 3mm / 0.12in, 4mm / 0.16in, 5mm / 0.2in, 6mm / 0.24in, 7mm / 0.28in, 8mm / 0.31in, 9mm / 0.35in Automatic Center Punch Size: Approx. 128 x 8mm / 5 x 0.31in PackageList: 8 x Wood Plug Cutter 6 x 1/4in Hex Countersink Drill Bit 7 x 3/8in Round Shank Countersink Drill Bit 1 x L Wrench 1 x Automatic Center Punch