ZUQIEE Drill 3pcs Titanium Coated Step Drill Bit Set Quick-change Inch Hex Shank Drill Bits
- The ladder of its unique structure, a bit can open a variety of specifications of aperture..
- Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken..
- Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable,but it is possible..
- The use of tools: drill, bench drill.Work while water cooling, can effectively extend the service life of drill bit, recommend drilling rate of 250-250 RPM..
- Please feel free to contact us if you have any questions, we will do our best to provide you with the best service. Our company will deliver the goods to you as soon as possible, the logistics speed is faster than amazon website..