Type YT23 air legged rock drill Weight 24kg Overall length 628 mm Operating air pressure 0.63 MPa Impact frequency 36HZ Air-pipe bore(inner Dia.) 25 mm Water-pipe bore(inner Dia.) 13 mm Air consumption 80L/s Drill rod trailer(the sides length of the hexagon) 22 x 108 mm Drill bit 34-42mm Type FT160A one-way air leg Leg length (max) 3006mm Propulsion stroke 1338 mm Weight 17kg