Rovtop 3-piece step drill bit set, HSS stainless steel, 4-12/20/32 mm, titanium conical triangle, with hexagonal shank, for drilling in steel, brass, wood and plastic

[High-quality materials, quality assurance] The drill bits and cone drills are made of high-quality HSS stainless steel, guaranteeing a long service life. Operating instructions: Hold the drill as vertically as possible while drilling. Avoid vibrations and tilting, and do not rotate the drill too quickly. [Time- and energy-saving, efficient and fast] The HSS cone drill bit is made of high-speed steel, which reduces heat and friction, allows it to cool quickly, and automatically removes drill chips from the hole during drilling. The spiral design prevents slippage and facilitates and optimizes drilling. [Three sizes for your needs] 4–12 mm, 4–20 mm, 4–32 mm – choose the right drill bit for your requirements. [Versatile applications] The product is suitable for working with thin iron sheets, aluminum, insulation boards, PVC sheets, wood panels, and other materials up to 3 mm thick.