Then, when the drilling screw is hammered into a steel plate and the like with an impact type air driven screw fastener, {HEAD ~ the sharp taper bit} can be inserted through {TAIL ~ the steel plate} and the like with small resistance 
Then , when the drilling screw is hammered into a steel plate and the like with an impact type air driven screw fastener , { HEAD ~ the sharp taper bit } can be inserted through { TAIL ~ the steel plate } and the like with small resistance
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH