3pcs HSS Titanium Drill Bit 3-12/4-20/4-12 Metal High Speed Steel Wood Hole Cutter Cone Drill

🌼Name:HSS Titanium Drill Bit
📏Size: 3-12/4-20/4-12mm
☔Material: HSS
🎨Color: gold
🎁Package Included: 3pcs HSS Titanium Drill Bit

✨ ●Features● ✨
1. Unique stepped structure, a drill bit can open a variety of specifications and sizes of apertures, and a step drill can fit a box of drill bits.
2. No center punch is needed, and it is not easy to break compared with ordinary twist drills. For on-site construction, one step drill is suitable for multiple specifications.
3. It becomes possible to deburr, chamfer, open oval holes to expand, and functions that twist drills cannot accomplish.
4. Compared with ordinary twist drills. The shaking is small, and the beautiful aperture can be opened without first using the center punch.
5. Use tools: pistol drill, bench drill. Water injection cooling while working can effectively extend the life of the drill bit. The recommended drilling speed is 250-400 rpm.