Feature: 1. It is made of black high‑carbon steel material, strong and durable, not easy to corrode. Carbon steel structure is lighter than standard auger to guarantee safety. 2. Optimize performance and easily remove scrap. With the help of an automatic screw bit, a hole with a precise diameter can be easily cut. 3. The internal thread of the shank can convert a variety of adapters and rods. 4. 4 slots and 4 edges design, large slots and large scrap removal, stable cutting and smooth scrap removal. 5. Both the electric wrench extension rod and the hex shank extension rod adopt the common specifications on the market. 6. Woodworking drill bits are very suitable for drilling hardwood, softwood, plastic, etc. The grooved hex grooves can be used for electric hand drills. Specification: Condition: 100% Brand New Item Type: Woodworking Drilling Kit Material: High‑carbon SteelOptional Size: 16mm / 0.6in, 18mm / 0.7in, 20mm / 0.8in, 22mm / 0.9in, 25mm / 1inKnife Handle Type: Internal Thread M10 Outer Edge Angle (degrees): 45 degrees Knife Length: Approx. 80mm / 3.1in Hex Handle Diameter: Approx. 6.35mm / 0.3in Handle Base Diameter: Approx. 9.5mm / 0.4inTotal Length: Approx. 130mm / 5.1in . Package List: 1 x Drill Bit1 x Wrench Rod1 x Hex Handle Rod