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Black Speed Steel Titanium Step Spiral Drill Groove Conical Cone Drills Power Tools 4-32mm
Material : High Speed Steel
Color : Black (as the picture shown)
Shank:25 x 10mm
Total Size: 30 x105mm
Surface : Nitrogen treatment (increasing the hardness and abrasion resistance)
Shank:Triangle round handle
Scop : thin iron plate,aluminum,insulation panels,PVC panels 4mm thickness within the timber.
1 x 4-32mm Spiral Grooved Drill