1,Quality air leg rock drill 2,Super model ORB-YT24 3,Big drilling power 4,Durable ,use-friendly Rock Drill. YT24 air-leg rock drill has wide applications. It is ... -18),and drilling boreholes which are perpendicular to the rock face of roof. The diameter of the blasting holes ... 5m. This machine can also work with different air legs - FT160BDshort leg, FT160BC long leg, or FT160S double legs, to fit in ...