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

Product Description: Unique Stepped Design. This drill bit can be used to open holes of various sizes, equivalent to a drill bit set. These bits are designed to precisely drill holes of different sizes, from 4mm to 32mm in diameter, with optimal speed and accuracy. Easily identify the size you need thanks to the contrasting sizes, laser-engraved inside the fluting of the bit. HSS Titanium Coating. Our stepped drill bits are made of super-strong HSS steel and coated with titanium for even greater durability. High-speed steel tools are suitable for most general applications, offering a combination of hardness and toughness for wear resistance. -It also proves the drill's ability and durability through multiple drillings on surfaces such as: plastic, aluminum, copper, stainless steel, wood, etc. -Stable, operates without pre-work. Hexagon shank design: The 1/4" quick-change hex shank fits securely into power tool chucks and eliminates slippage. It's an excellent universal fit that will give you confidence while you work, knowing your drill bit is securely in place. Increased cutting speed: The double-flute design allows for faster and smoother drilling. Thanks to low pressure, the bits can cut wood, sheet metal, steel, and other surfaces. Nylon bag: Packed in a nylon bag, offering good protection. NOTE: When using these drill bits, the material temperature will be very high; please add water or coolant to prevent smoke. Suitable for parts with a hardness of 25° or less and a thickness of less than 5mm for wood, plastic, and thin metal. The recommended speed for stepped drill bits is 250-400 RPM. Always wear safety glasses when working with tools. Length: 5 Drill Bit: 4-12mm Length: Approx. 6.7cm/2.64" 9 Drill Bit: 4-20mm Length: Approx. 7.4cm/2.91" 15 Drill Bit: 4-32mm Length: Approx. 10.2cm/4.02" The 3rd dimension is between the following: Size1:4-12mm(4mm,6mm,8mm,10mm,2mm); Size2:4-20mm(4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,14mm,16mm,18mm,20mm); Size3:4-32mm(4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm).