Carbide Rock Drilling For Hard Rock Drilling Taper Button Bit
https://www.kqdrill.com/product/tapered-bits/tapered-drilling-tools-5.html
Adavantage :
1. High fatiue strength and tougness.
2.The crushing ability is strong, the rock drilling speed is fast, and it is convenient for grinding.
Application:Mines, tunnels, water conservancy