General description The 5Pcs Step Drill Bit set is designed for precision drilling in various materials including steel, brass, wood, plastic, and more. Made from high-quality HSS steel and coated with titanium, these drill bits reduce friction and heat, ensuring a longer lifespan and efficient performance. The set includes five standard drill bits that can replace a total of 47 individual sizes, making it a versatile addition to any toolbox. Technical specifications Material: High-speed steel (HSS) with titanium coating Center punch material: Shock-resistant alloy steel Drill bit set includes: 5 bits replacing 47 sizes Hex shank: 1/4 inch quick release Blade design: Double-edged for faster cutting Center punch: Provides automatic, powerful, spring-loaded impact Usage Ideal for drilling holes in steel sheets, aluminum sheets, copper plates, plastics, and wood Automatic deburring of holes to keep the drill bit clean Convenient for positioning before drilling and breaking windows in