{HEAD ~ The device} comprises a de burring tool 10, 25 having {TAIL ~ an impact surface} with a profile which corresponds with the profile of the region of the workpiece which requires de burring 
{ HEAD ~ The device } comprises a de burring tool 10 , 25 having { TAIL ~ an impact surface } with a profile which corresponds with the profile of the region of the workpiece which requires de burring
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH