1.Drill Bit 2.Factory price 3.ISO9001 4.Good Serive 5.PDC TAPER DRILLING TOOLS1. Bit Type: tapered drilling tools2. Diameter : 28mm - 65mm3. Taper: 6°, 7 °, 11°, 12°4. Bottom Hole: 22mm, 25mm5. Bit Body: Short skirt and Long skirt6. Water Hole: 3The taper cross bits can be used under any rock drilling condition because of it's comprehensive adaptability.Taper chisel bit is mainly used for hard ...