General description 5-Piece Countersink Drill Bit Set designed for woodworking, featuring adjustable 1/4-inch hex shank for quick changes. This set includes replaceable countersink drill bits and a hex wrench, making it ideal for both home and professional use. Technical specifications Material: High-quality high-speed steel Hardness: HRC 62-64 Standard Angle: 82° Hex Shank Size: 1/4-inch Compatibility and accessories Compatible with most household drills Includes 5 replacement drill bits Comes with a hex wrench Usage Suitable for drilling, countersinking, and reaming in one step Can be used on wood, plastic, PVC, fiberboard, chipboard, plywood, rubber, and more Other information All bits are packaged in a plastic case for easy organization and storage