Cuts receiver thread minor diameter for the Piloted Tap/Mandrel. Cuts receiver lugs to equal heights. Must use with the Receiver Tap Bushings which are included with Manson Receiver Taps sold here. Available Standard or .010" Oversize.
Big Book Catalog, Issue:70, Page:466
SPECS: High speed steel. 10½" (26.6cm) long. .010" Over -1.012"diameter; Standard - 1" diameter.