High Quality 3pcs 4 12/4 20/4 32 Speed Steel Step Drill Bit Set Round Shank

High Quality 3pcs 4 12 4 20 4 32 High Speed Steel Step Drill Bit Set
  • Seller Top Guardian
  • List Price US $30.60piece
  • Sale Price US $15.30piece
  • Shipping Free Shipping
  • You Save US $15.30piece50% off
  • Ratings 5.0 (92)

Item Specifics

Brand Namedoersupp
DIY SuppliesMetalworking
UseMetal Drilling
TypeTwist Drill Bit
MaterialHigh Speed Steel

Product Description

Mainly used within 3mm sheet steel drilling,
a drill bit can replace the use of multi-branch;according to the needs of

different diameter hole, and can achieve big hole to complete a one-time processing,
without having to change the drill bit

and hit the positioning holes and so on.


1, The ladder of its unique structure, a bit can open a variety of specifications of aperture.

2, Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.

3, Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,

but it is possible.


The overall ladder drill using CBN grinding whole manufacturing, the main material for high-speed steel, carbide,

high precision machining,according to different processing conditions can be surface coating to extend tool life,

add to enhance durability.



4-12mm(4, 6, 8, 10, 12)mm

4-25mm(4, 6, 8, 10, 12, 14, 16, 18, 20)mm

4-32mm(4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32)mm


4-12mm: 5mm(dia),20mm(L)

4-20mm: 7mm(dia),23mm(L)

4-30mm: 9mm(dia),25mm(L)



Allow 1-2mm measurement error.

Material:High speed steel

Package include

3x Hex Titanium Step Drill

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