... light, easy to operate 3 Air consumption: 5 m3 YT28 Hand Hold Jack Leg Rock DrillFunction:1, drilling downward2, blast-holes in ... nard3, hard rock with a hardness of f=8~18YT28 Hand Hold Air Leg Rock Drill is an ideal tool for rock ... areas, etc, and for secondary blasting in large mines.SPECIFICATIONSYT28 Hand Hold Jack Leg Air Rock Drill Air-leg rock drillsTypeYT28 Weight ...