4-32mm 4-20mm 4-12mm 3-12mm HSS Titanium Coated Step Drill Bit High Speed Steel Metal Wood Hole Cutter Cone Drilling Tool

Features:
1. Unique stepped construction, with one drill bit capable of opening multiple sizes and apertures, and one stepped drill bit supporting a box of drill bits.
2. The center punch is not needed, and it is not easy to break compared with the ordinary Fried Dough Twists drill. On site construction, a ladder drill with multiple specifications is suitable.
3. It is possible to perform functions that cannot be completed by deburring, chamfering, rounding and reaming, and Fried Dough Twists drills.
4. Compared with the ordinary Fried Dough Twists drill, it has less shaking and can open a beautiful hole without using a center punch.
5. Tools used: pistol drill, table drill. Cooling with water while working can effectively extend the service life of the drill bit. It is recommended to drill at a speed of 250-400 revolutions per minute.
Specification:(Please refer to the details page below for specifications and dimensions)
Notes:
1. Manual measurement, please allow an error of 1-3mm. Thank you.
2. Due to differences between different monitors, images may not reflect the actual color of the item. We guarantee that the style is the same as shown in the picture.