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taper angle(degree): 4°46′, 6°, 7°, 11°,12°<br/> shank size: Hex 22mm*108mm/25mm*159mm length: 0.6m- 8m high quality Material:Material: Z708(40SiMnCrNiMo)/55SiMnMo

Model Number:Hex22*108mm<br/> Rod Length:500~6400mm Type:H22 Tapered drill rod Material:Material: Z708(40SiMnCrNiMo)/55SiMnMo

Shank size: HEX25*108<br/> Length: 400mm,800mm,1600mm,1800mm,2400mm,3200mm etc. Taper Degree: 7°, 11°, 12°. Materials:Z708(40SiMnCrNiMo)/55SiMnMo

product name: tapered chisel bits <br/> Connect shank Size:Hex 22mm*108mm,Hex 25mm*108mm<br/> Bit Diameter: Range from 20 to 60mm<br/> Taper degree: 6 °, 7 °, 11°, 12 °<br/> Material︰40Cr, 42CrMo.<br/> Category:Small hole drilling

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