Thumb screw 8 spans {HEAD ~ slot} 8a formed by arms 8b and 8c, and is used to clamp {TAIL ~ one end} of a metal electrical conduit pipe 35 when bending the pipe 
Thumb screw 8 spans { HEAD ~ slot } 8a formed by arms 8b and 8c , and is used to clamp { TAIL ~ one end } of a metal electrical conduit pipe 35 when bending the pipe
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH