1) With carbide buttons hot pressed on bits bodies, Tapered Button Bits have a very good drilling performance and long life time. Different diameters and taper degrees are available to suit different applications in mining, quarrying etc. We can supply long skirt and short skirt Tapered Button Bits. 2) No matter what kinds of rock—Soft rock, loose medium rock, hard rock and any other special formations, just tell us what you need and leave others at our disposal, We can also do according to customers' drawing or sample. So if you are interested in our products, please feel free to let us know. We also wish can do business with the people from all over the world. Specification 1)Button shape: Spherical, Ballisti 2)Skirt: Long skirt, Short Skirt. 3)Taper degree: 4°, 6°, 7°, 11°, 12° 4)Package: In wooden case or in carton5)Shank Hex. Size: 19mm, 22mm, 25mm