3Pcs HSS Spiral Flute Step Drill Bit Triangle Shank with Automatic Center Pin Punch for Hole Drill
$32
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Features
Spiral groove step drill bit
-Titanium coating reduces friction and heat.
-Surface nitrogen treatment (increase hardness and wear resistance)
-High-speed steel:Higher quality than ordinary twisted drilling, and durable.
-Can work without coolant.
-The unique step structure:the drill can drill a variety of sizes of the aperture.
Center Pin Punch
-Simple and accurate to use knurled handle prevents slipping.
-Spring pressure can be adjusted by simply rotating the knurled top of the punch.
Specification
Spiral groove step drill bit
Type:Step drill
Material:HSS
Surface treatment:Nitrogen treatment (increase hardness and wear resistance)
Shank shape:Triangular round handle
Quantity:1 Pc x 4-12mm Step Drill Bit
1 Pc x 4-20mm Step Drill Bit
1 Pc x 4-32mm Step Drill Bit
Size
Cutting Diameter Range:Length:Shank Diameter:Weight
4-12mm:Approx 65mm / 2.60 inch:6mm:18.5g
4-20mm:Approx 76mm / 2.99 inch:8mm:47.5g
4-32mm:Approx 101mm / 4.02 inch:10mm:167.6g
Center Pin Punch
Material:Knurled steel body, alloy steel tip
Color:Black
Total length:5 inch
Package Included
1 Pc x:4-12mm Step Drill Bit
1 Pc x:4-20mm Step Drill Bit
1 Pc x:4-32mm Step Drill Bit
1 Pc x:Center Pin Punch
1 Pc x:Cloth bag
| Weight | 0.323 kg |
|---|
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