This is the Body Reamer from HPI.

FEATURES: 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 plastic case is included for safe storage
          Purple anodized handle

INCLUDES: One HPI Body Reamer with plastic safety case

SPECS:    Total Length: 5-5/8" (143mm)
          Blade Length: 2-3/4" (70mm)
          Diameter: 3/4" (19mm)

                                                                    mlm 7.20.06
                                                                         ir/jxs