3Pcs Nitriding Spiral Groove Perforation Ladder Step Drill Cobalt Step Drills
3Pcs Nitriding Spiral Groove Perforation Ladder
Step Drill Cobalt Step Drills
Triple-cornered round handle Surface treatment: treatment of nitrogen (the increase in resistance to hardness and abrasion)
Unique step structure that works with most hand drills. It has titanium coating to reduce friction and heat.
Material: High speed steel
3 x Drill Bits
Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-1-3cm.)