This is the EXI Ultimate Body Reamer.

 

Designed to create and enlarge holes in Lexan, ABS, balsa, polycarbonate-almost any hobby material.
Extra sharp point starts holes quickly and precisely; razor sharp flutes remove debris while cutting for clean, perfect results.
Handle is made of knurled anodized aluminum for a secure comfortable grip.
A cap protects reamer tool when not in use, and fits onto the handle base during cutting.
Anodized handle and safety cap.

One EXI Ultimate Body Reamer and one safety cap.