ZVD - 3PCS hss Step Drill Bits 4-12mm / 20mm / 32mm Titanium Taper Drill Bit Countersunk Drill Bit for Steel, Brass, Wood, Plastic

Size: Size 1: length 7 cm, meter (mm): from 4 to 12: 4,5,6,7,8,9,10,11,12 Size 2: length 7 cm, meter (mm) : from 4 to 20: 4,6,8,10,12,14,16,18,20 Size 3: length 10 cm, meter (mm): from 4 to 32: 4,6,8,10,12, 14,16,18,20,22,24,26,28,30,32. With 4mm Twist Drill: The 4mm twist drill can pre-drill the step drill, which makes the step drill less easily damaged than the ordinary step drill. Material: Stepped drill bits suitable for DIY, home and construction. It is very suitable to use for drilling holes in a variety of materials like steel, brass, wood, plastic, thin iron plates, aluminum materials, insulation plates, PVC plates, etc. Only suitable for ordinary aluminum, iron and steel plate (thickness can not be more than 4mm, hardness is less than 25HRC), not for stainless steel. Robust and durable: Set of 3 Milling Cutter Drill Bit Etage is made of high quality HSS steel and coated with titanium to reduce friction and heat. Attention: If you have any questions about the quality of our