Shandong Jinbaoshan Machinery Co.,Ltd is selling this:

Other Driling Buttons Bits and Shank Adapter Coupling Ex

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Introduction of chisel bits:
Chisel bit is also namely wind bit for rock drill (drill) machine.Chisel bit includes a cutter bar, tool rod has a sophisticated, cutting-edge, there are two parts of the main plane on a cutting blade. A kind of concrete, such as drilling, soothe drilling condition of sudden change, make the drilling operation is stable, even when you produce large chip, it won’t reduce the efficiency of drillingbit.Different diameters and taper degrees are available to suit different applications in mining,quarrying etc. We can supply long skirt and short skirt Tapered Chisel Bits.
Specifications of chisel bits:
1. Bit:chisel bits for drilling machine
2. Diameter:32mm – 42mm
3. Taper:7 degree
4. Bottom Hole: 22mm, 25mm
5. Bit Body:Short skirt and Long skirt.
http://www.rockymac.en.alibaba.com