Chisel Bit Intergral Drill Rod 1.Shank size: H22 x 108mm (7/8 x 4 ... 1/4 ) 2.Length: 400mm - 3000mm 3.Diameter: 26mm - 42mm Chisel Bit Intergral Drill ... chisel bits, cross bits, button bits, tapered drill rods, integral drill steels, plug hole integral steels, pick rods, ... according to the different working conditions.The integral drill rod has these advantages: they reduce the ...