Features Exceptional Cutting Power: Experience superior performance with high durability and wear resistance, ensuring precision cuts every time Faster Drilling Efficiency: Equipped with dual chamfered grooves, this set facilitates quick and self-cleaning drilling, minimizing downtime and maximizing productivity Versatile Material Compatibility: Perfectly designed for use with bench drills, hand drills, and electric drills, ideal for wood, plastic, rubber, and more High-Grade Steel Construction: Crafted from premium materials, the drill bits provide exceptional hardness and durability, ensuring long-lasting use in various projects Convenient Hex Shank Size: Featuring a 1/4in hex shank diameter, this set includes multiple sizes (3.5mm to 2mm) for versatile applications in your woodworking tasks Features: 1、Excellent Cutting Power: Countersink drill bit set has excellent cutting power, high durability and good wear resistance 2、Faster : The drill bit can be accurately inserted into the countersunk socket, and the two chamfered grooves enable faster and self cleaning drilling on chips 3、For Various Materials: Countersink drill bits are ideal for bench drills, hand drills and traditional electric drills, which are very suitable for wood, fiberboard, particleboard, plywood, plastic, PVC, rubber, etc. 4、High Hardn And Good Wear Resistance: The drill bit is made of high grade steel, and the countersunk drill socket is made of high carbon steel, which has high hardn and good wear resistance 5、1/4in Hex Shank Diameter: The diameter of the hex shank of the drill socket is 1/4in, and the tool diameter includes 3.5, 3.25, 2.75, 2.5, 2mm(9/64, 1/8, 7/64, 3/32, 5/64in) Specification: Item Type: Countersink Drill Bit Set Material: Drill Bit: High steel, Countersunk Drill Socket: High carbon steel Tool Diameter: 3.5, 3.25, 2.75, 2.5, 2mm (9/64, 1/8, 7/64, 3/32, 5/64in) Drill Socket Hex Shank Diameter: 1/4in Package List: 5 x Drill Bit 5 x Drill Bit With Countersunk Shank 1 x Wrench Note: Do a good job of safety protection when using. Package List 5 x Drill Bit 5 x Drill Bit With Countersunk Shank 1 x Wrench