General description The Premium 8-Piece Reduced Shank Drill Bit Set is designed for drilling large holes over half an inch in diameter in various materials including wood, plastic, aluminum, copper, cast iron, mild steel, stainless steel, and sheet metal. This set is ideal for applications such as woodworking, automobile repair, equipment and machinery maintenance, and metal fabrication. Technical specifications Material: M2 cobalt high-speed steel Tip angle: 135 degrees Sizes included: 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" Shank size: 1/2 inch reduced shank Compatibility and accessories Compatible with all standard drills and most power tools Unique triple flat shank design prevents slippage during operation Usage Ideal for drilling in wood, plastic, aluminum, copper, cast iron, mild steel, stainless steel, and sheet metal Suitable for a wide range of applications including woodworking, automobile repair, and metal fabrication Other information Advanced dual-layer