3pcs Metric Step Cone Drill Bit Set for Metal 1/4 Inch Hex Shank (4-12, 4-20, 4-32mm)

Feature

3pcs step drill bit set hole cutter, includes 4-12, 4-20, 4-32mm. A single bit can be used for drilling a wide range of hole sizes.
Step cone drill bit set, made from high quality HSS for a long service life, and with the Titanium coated to reduce friction and heat.
As the sharp increase to the next step size allows the cutting edge to scrape burrs off the entry surface of the workpiece.
The step drill bit come to a point and are thus self-starting. No need to use center punch.
Suitable for cutting holes in a variety of materials including steel, brass, wood, plastic, etc. Smooth and burr-free.

Description

Features:
1. Quick-change 1/4 inch hex shank
2. The larger-size bits have blunt tips and are used for hole enlarging.
3. Cool-running titanium coating lasts longer than uncoated bits
4. High speed steel for longer life
5. Automatically deburrs holes while drilling
6. Two-flute design gives you faster, smoother cutting

Specification:
1. Material: High Speed Steel
2. Surface: Titanium Plated
3. Groove Type: Spiral Groove
4. For Drilling in: thin iron plate, aluminum, insulation panels, PVC panels 4mm thickness within the timber.

Package list:
1x 5-step drill bit: 4-12mm
1x 9-step drill bit: 4-20mm
1x 15-step drill bit: 4-32mm