915 Generation HSS Spiral Grooved Step Drill Set Hole Cutter Wood Cone Core

[Advantages]:1, step structure, a drill can drill a of sizes of the .
2, You can deburring, chamfering, punching elliptical hole.
3, Suitable for installation in the drill and bench drill.
4, The hardness of the workpiece the use of 25 degree , such as iron, aluminum, PVC board, insulation board, wood, workpiece thickness 4mm.
5. starting drilling and screwing, the Automatic Center Punch can be used to hole locations. It delivers an automatic, high-impact, spring-loaded 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.
Type: Core Drill Bit
: Metalworking
Model Number: 4-32,4-20,4-12
Use: Metal Drilling
Type 1: Metal Stepped Drill
Type 2: Steel Plate Opening Device
Type 3: Step Drill
Type 4: Triangle Center Drills
Type 5: Woodworking Cutter
Type 6: Metric Step Drill steeped tools bits
: Reaming Drill
Type 8: Spiral Groove, Fast Drilling
Type 9: Deburring And Chamfering
Type 10: High-Speed Steel 4241 Titanium Coating
"X" shaped openings, drilling is not easy to slip.
Higher precision, more sharp, -free drilling.
Spiral groove chip removal performance higher.
[Handle]: Triangle round handle, prevent sliping.
[Surface treatment]: The gold is titanium coating, the black is nitriding treatment, more wear and oxidation resistance, not rust.
[Specification]: 4 - 12 mm 5 Steps (4mm,6mm,8mm,10mm,12mm) 4 - 20 mm 9 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm)
4 - 32 mm 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)
colour:Gold
Material:High speed steel
Package Contents:
3*Step Drill Bit
1*Center Punch
Only the above package content, other are not included.
Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.