Set of 3 Step Drill Bits, HSS Stainless Steel, 4-12/20/32mm, Titanium Conical Triangle, with Hexagonal Shank, for Drilling and Screwdriver Work on Steel, Brass, Wood, and Plastic - Fei Yu

General Description: This set of 3 step drill bits is designed for precisely drilling holes of various sizes, ranging from 4 mm to 32 mm in diameter. Made from high-quality HSS steel and coated with titanium, these drill bits reduce friction and heat, thus offering increased durability. They are ideal for a variety of materials such as steel, brass, wood, and plastic, and allow drilling without the need for pilot holes or pre-drilling.

Technical Specifications Material: HSS steel with titanium coating Diameters: 4-12 mm, 4-20 mm, 4-32 mm Drill Bit Lengths: 4-12 mm (6.7 cm), 4-20 mm (7.4 cm), 4-32 mm (10.2 cm) Recommended Drilling Speed: 250-400 RPM/min Maximum Material Hardness: 25° Maximum Material Thickness: 5 mm Compatibility and Accessories Suitable for drilling materials such as: steel, aluminum, copper, brass, fiberglass, PVC, plastic, wood Contents: 1 set of 3 drill bits with 1 storage bag Usage For optimal use, it is advisable to add water or coolant during drilling to prevent overheating. Always wear safety glasses when using tools. Other Information The drill bit sizes are laser-engraved for easy identification. The drill bits automatically deburr drilled holes.