The cutting head at each end of the insert is provided with an upper chip surface 13, which is provided with a chip forming device in the form of a number of recesses 14, {TAIL ~ each} of which has {HEAD ~ concave cross section} 
The cutting head at each end of the insert is provided with an upper chip surface 13 , which is provided with a chip forming device in the form of a number of recesses 14 , { TAIL ~ each } of which has { HEAD ~ concave cross section }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD