Multiple sizes: This set includes 4 cone drill bits and 4 claw drill bits to meet your daily working needs. Each shape has four sizes, 1 or 4", 3 or 8", 1 or 2", 5 or 8" (6mm or 10mm or 13mm or 16mm). Shank Diameter: Approx. 9.5mm. High quality carbon steel: The wood plug cutter set is made of carbon steel, durable and corrosion resistant, high precision, high strength and with a smooth surface. Practical functions: 4-tooth chamfered punches make tapered plugs for filling countersinks, while standard punches are used to remove wood defects. Applications wide: suitable for bench and hand drills, we recommend the use of bench drills for more stable operation and improved work efficiency. Note: the speed should not be too fast, because it is easy to produce smoke, burns, etc. Specification: Material: Carbon steel Rod type: Round Shank diameter: approx. 9.5mm Size: 1 or 4", 3 or 8", 1 or 2", 5 or 8" (6mm or 10mm or 13mm or 16mm) Package includes: 8 wood drill Welcome to meet Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store