Sinodrills Tapered Bit
Tapered chisel bit, tapered cross bit, tapered button bit
Tapered cross bit diameter: 30mm, 32mm, 35mm, 38mm, 41mm, etc.
Tapered button bit diameter: 28m, 30mm, 32mm, 34mm, 36mm, 40mm, etc.
Tapered bit degree: 4°46´,7°, 11°, 12°, etc;