... , hex.32mm, dia.32mm, Dia.38mm, dia.45mm dia.51mm(3)Wall thickness: 11mm-14mm (0.43-0.55)(4)Length ... hole Drill Bit(1)Diameter: 38mm-70mm.(2) shape; carbide 3-blade type , steel cross bit , carbide cross bit ,button bit andetc ... (3)Package: in wood case or in carton(4) Productivity: 10000pcs/ ...