... rock drill riffle bar, riffle nut, chuck sleeve, etc. Pneumatic Drifter Spare Parts ( All Kinds )We are making the spare parts ... for crawler drill, drifter, rock drill and so on.eg: Riffle bar, Riffle nut ... , Chuck sleeve, etc. crawler drill,crawller drill, drilling, drifter, hammer, hamma, drilling rig,drill rig, rock drilling, rock drill ...