Features Versatile Application for Various Materials: Ideal for drilling through stainless steel, iron, copper, aluminum, wood, and acrylic sheets, ensuring excellent performance across a range of projects Compatible with Multiple Drills: Works seamlessly with ordinary pistol drills and electric drills, providing flexibility and convenience for different power tool setups Premium High-Speed Steel Construction: Crafted from high-quality HSS for exceptional sharpness and wear resistance, guaranteeing long-lasting durability and reliable performance Enhanced Drilling Efficiency: Designed for both industrial and household use, these drill bits ensure fast and effective drilling, saving you time on every project Precision Ground Cutting Edges: The cutting edges are expertly ground for quick penetration and reduced friction, allowing for smoother drilling and improved accuracy Features: 1、Scope of Application: Suitable for drilling holes on stainl steel, iron, copper, aluminum, wood, acrylic sheet, etc. 2、Applicable to ordinary pistol drill, electric drill. 3、The drill bit is made of high-quality high-speed steel, high sharpn and wear resistance 4、High drilling efficiency, can be used in industrial and household. 5、Cutting edges are precision ground and proced to ensure fast drilling. Specification: Item Type: Drill Bits Material: High Speed Steel Quantity: 10pcs / box Optional Diameter: 4.0mm, 4.2mm, 4.5mm 4.0mm 10PCS per box / full grinding 4341 (1 box total) 4.2mm 10PCS per box / full grinding 4341 (1 box total) 4.5mm 10PCS per box / full grinding 4341 (1 box total) Scope of Application: For drilling (Suitable for stainl steel, iron, copper, aluminum, wood, acrylic sheet, etc.) Applicable Equipment: Ordinary pistol drill, electric drill. Package List: 1 Box of Drill Bits Package List 1 Box of Drill Bits