3Pcs 4-12 / 20 / 32mm Titanium HSS Bit Hole Fluted Edge Drill Shank
3Pcs 4-12 / 20 / 32mm Large Titanium HSS Step Cone Drill Bit Hole Cutter Set Fluted Edge Step Drill Reamer Shank
100% brand new and high quality
Material: High speed steel 4241.
Model Number: 4-12 / 20 / 32mm Large HSS Steel Step Cone Drill
Type: Core Drill Bit
goods: Hole Cutter Cone Drill Bits
Size: 4-12mm 4-20mm 4-32mm Step Drill
Color: Golden (as shown)
Quantity: 3 Pcs
Set of 3 for jobs of all sizes
2 fluted edges for faster, smoother cutting
3 sided shanks prevent slippage when in chuck
drill perfectly round holes in materials
HSS Titanium Coated Step Drill Set
large Titanium HSS Step Cone Drill Bit Hole Cutter Set
Step Drill Set Titanium Industrial HSS Reamer
Use Holes in a Variety of Materials Including:brass wood Plastic iron steel plate PV board insulation board
The hardness of the workpiece below, the use of below 25 ��, such as iron, aluminum, PVC board, insulation board, wood, paper 5mm thickness.
When the edge of the edge of the drill bit cool down (you can add cold water, add cold oil, blowing compressed air), can effectively extend the service life of the drill bit, drill recommended speed 250-400 rpm.
There is 1 ~ 2cm error because munual measurement Posted by horizontal.
3 Pcs Triangle Shank Drill