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