3 pcs HSS Titanium Step Drill Bit Set 1 pcs Automatic Center Punch

Specification

24 sizes individual drill bits in 3: This set includes three standard step drill bits that replace 28 individual drill bits, comes with one 4 to 12mm five-step bit, one 4 to 20mm nine-step bit, and one 3 to 12mm ten-step bit.
Strong durability: HSS + titanium durability.
Avoiding the inconvenience of a tri-flat shank to ensure a firm grip.
Easy drilling: Two-fluted design provides faster, smoother cutting.
Provided with small pressure and the sets can cut through wood, sheet metal, steel and other surfaces.
Automatic center punch: Delivers an automatic, high-impact, spring-loaded strike when pressed against surface, adjustable cap regulates striking force.
Wide usages: Mark hole locations and start drill bits and screws, preventing wandering, heat treated alloy steel punch with sharp precision tip, corrosion-resistant brass body with non-slip knurled grip.
This compact set replaces 24 individual drill bits in 3pc Step Drill Bits which includes one 4-12mm, one 4-20mm, and one 3-12mm.
Two-fluted design can provide faster, smoother cutting.
Note:
Before starting drilling and screwing, the Automatic Center Punch can be used to mark hole locations.
It delivers an automatic, high-impact, spring-loaded strike when pressed against wood, metal, and plastic surfaces.
An adjustable cap regulates striking force.
It features a heat-treated alloy steel punch with a sharp precision tip and a corrosion-resistant brass body with non-slip knurled grip.
The 3 Cutters Come in the Following Sizes:
5 step drill bit: 4-12mm (4mm, 6mm, 8mm, 10mm, 12mm)
9 step drill bit: 4-20mm (4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm)
10 step drill bit: 3-12mm (3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm)
Color:gold

Package included:

3 x Metric Step Drill Bit
1 x Auto Center Punch
Only the above package content, other products are not included.