Feature

●【Widely Used】Perfect Step Drill Bits suitable for drill holes in various material： within 3mm/0.12 inch (Iron Plate, Copper Plate, Aluminum Plate); within 5mm/0.2 inch (Wood, PVC sheet, Insulation Boards). Not suitable for hard and brittle materials such as stainless steel, glass, tile floors, walls etc.
●【Material】HSS combined with a titanium coating. More capable and durable. Coated by titanium,this step drill set performs well in heat,corrosion and rust resistance.
●【Easy Drilling】Two-Flute Design for smoother cutting. High Step design let you feel the stop and never drill bigger in mistake
●【SET INCLUDES】Bit #1 (9 steps): 4-12mm (4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm,12mm); Bit #2 (9 steps): 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm); Bit #3 (15 steps): 4-32mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm,30mm,32mm)
●【Package Included】 3-Piece HSS Sprial Groove Step Drill Bit (4-12/ 4-20/ 4-32mm ) + 1 Automatic Center Punch. 1/4" Hex shaft drives are suitable for all kinds of for home DIY power drills.


Description

Spiral Step Drill Bit Set Spiral Step Drill Bit Set

3Pcs HSS Spiral Step Drill Bit Set

hole drilling bit sethole drilling bit set

hole drilling bithole drilling bit

stepping drill bitstepping drill bit

MEASUREMENT

  • 4-12 9 Steps (Diameter 4, 5, 6, 7, 8, 9, 10, 11,12mm)
  • 4-20 9 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20mm)
  • 4-32 15 Steps(Diameter 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32mm)

QUALITY MATERIAL

  • HSS sprial step drill bits are constructed from traditional HSS combined with a titanium nitride coating to make them even more durable.

DESIGN

  • 135° X-type Split Point - Increases cutting speed with self-centering and prevents walking.
  • Two-flute Design - a faster and smoother cutting, allows particles escape easily.
  • Hex shank will not spin inside the chunk, compatible with different types of drill machines effectively.
stepped drill bitstepped drill bit

FRIENDLY REMINDER

  • Not compatible with hammer drill.
  • It is recommended to oil the bit before every use.
  • Please drill a smaller hole to make drilling smoother.
  • Please do not set drilling speed too high to avoid damages to cutting edge.
  • The metal material on which you want to drill should not exceed 0.18-inch in thickness.
  • When inject cold water while working, can effectively extend the service life of the drill bit.

step drill bit setstep drill bit set

WIDE USAGE & OUR SERVICE

  • Usage: Suitable for use in the hardness below 25 degrees workpiece, such as iron plate, copper plate, aluminum plate, the thickness of the plate of step is 3mm and wood, PVC sheet, insulation boards with a thickness of 5mm(0.2 inch) or less). Can not be used to hard and brittle materials such as stainless steel, glass, tile floors, walls etc.
  • Our Service: If you are not fully satisfied with our product for any reason, We promise you we will offer our greatest sincerity to help you solve the problem.