3 x Step Cone Drill Bit Titanium Hole Cutting Set

Features of the 3PCS Step Drill Bit Set:

High-speed titanium-coated steel replaces 28pcs separate drill bits.

Two different groove designs enable fast and smooth cutting.

Injecting cold water while working effectively extends the lifespan of the drill bits.

Recommended drilling speed is 250-250 RPM.

Can manually drill through 1mm thickness, for 2-3mm thickness, please use a bench drill.

The drill bits must be continuously cooled during operation and are not flammable.

Can process holes of different diameters as needed, enabling one-time processing of large holes without the need to change drill bits or position holes.

Specifications:

Shank: 1/4" Quick Change Hex Shank

Surface Treatment: Titanium

Material:

HSS (suitable for use on workpieces with hardness below 25 degrees, such as iron sheets, copper sheets, aluminum sheets, 3mm thickness and below of wooden step boards, PVC boards, insulating boards). Cannot be used on brittle materials such as stainless steel, glass, ceramic tile floors, walls, etc.

Measurements:

Bit #1 (6 Steps): 3/16 inch - 1/2 inch (3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch);

Bit #2 (9 Steps): 1/4 inch - 3/4 inch (1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch, 1/2 inch, 9/16 inch, 5/8 inch, 11/16 inch, 3/4 inch);

Drill Bit #3 (13 Steps): 1/8 inch - 1/2 inch (1/8 inch, 5/32 inch, 3/16 inch, 7/32 inch, 1/4 inch, 9/32 inch, 5/16 inch, 11/32 inch, 3/8 inch, 13/32 inch, 7/16 inch, 15/32 inch, 1/2 inch).