General description This CSPARKV 10pcs Combination Drill Bit Set is crafted from high-speed steel, ensuring high hardness and toughness. The set is rust-proof, strong, and durable, providing superior drilling performance. With a reasonable design, the 3mm center drill is incisive, wear-resistant, and heat-resistant, featuring a widened chip flute design that enhances high-speed operation and accelerates chip removal. Technical specifications Material: High-speed steel Quantity: 10 pieces Drill size: 3mm Compatibility and accessories Compatible with bench drills, milling machines, and machining centers Applicable for furniture, kitchens, woodworking, window doors, hinges, handles, and drawer slides Usage Ideal for both professionals and DIY enthusiasts Convenient and practical for various drilling tasks