3PCS HSS Step Drill Bit, 4-12/20/32mm, Titanium Conical Triangle, with Hexagon Shank, for Screwdriver Drilling on Steel

General description The 3PCS HSS Step Drill Bit set includes three high-quality drill bits with sizes 4-12mm, 4-20mm, and 4-32mm. Made from durable HSS stainless steel, these drill bits are designed for efficient drilling in various materials. Technical specifications Material: High-speed steel (HSS) Sizes: 4-12mm, 4-20mm, 4-32mm Maximum material thickness: 3mm Installation Use with an electric drill, ensuring it is as vertical as possible to avoid shaking or tilting. Avoid rotating the drill too fast for optimal performance. Usage Suitable for drilling thin iron plates, aluminum, insulation boards, PVC boards, and wood boards. The spiral design helps prevent slippage, making drilling easier and more efficient. Other information Includes a nylon cloth bag for convenient storage and protection.