Step Drill Bit, Metal Drill Bit Hss Step Drill Bit Steel Countersink Triangular Taper Drill Bit

Product Description
Package Contents: 4 Pieces Drill Bit Set
1.With 4mm twist drill: The 4mm twist drill can pre-drill the step drill, which makes the step drill less easily damaged than ordinary step drill bit. 2.Material: Step drill bits suitable for DIY, home and construction. It is very suitable for punching holes in a variety of materials, such as steel, brass, wood, plastic, thin iron plates, aluminum materials, insulation plates, PVC plates, etc Only suitable for ordinary aluminum, iron and steel plates (thickness can not exceed 4mm, hardness is less than 25 HRC), not for stainless steel.
3. STURDY AND DURABLE: the 3 piece end mill drill bit set is made of high quality HSS steel and coated with titanium to reduce friction and heat.