Sukudon 4pc Spiral Grooved Step Drill Bit Set High Speed Steel Titanium Coated Hole Cutter Power Tools for Wood Metal Stainless with Center Punch

DRILL SIZE - 3 kinds of @@@Z19JX+dM66YtItqQDvSecR8E04FNBrKT@@@ step drill bit set, the dimensions of step cutter for metal are: 4-12 mm, 4-20mm, 4-32mm; a total of 29Sizes, Step drills are mainly used for cutting wood, metal sheets, steel sheets and other MATERIALs DRILL MATERIAL - The step drill bits (metal cone drill bit) is made of high speed steel and titanium coating and has strong durability. 1/ 4" hex shank ensures that the power Tool is firmly clamped SPIRAL DESIGN - The spiral double-cutting blade design ( metal drill bit hardened) makes the cutting faster and smoother, and the step tool is automatically deburred from the hole when the drill bit is drilled LADDER DESIGN - It is possible to process large holes in one time without changing the drill bit and positioning hole. This step drill bit (metal drill bits) meets the need to machine holes of different diameters HSS CENTER PUNCH - 5 Inch Spring Automatic Center Punch Tool with The Rubber Cap Can Be Increased or Decreased Striking Force, It's More Easy to Use.