"TLENGTH OF END MILL IS 3.75 IN.; END MILL SHAFT DIAMETER 0.6248 IN.; END MILL CUTTING DIAMETER 0.875 IN.; CUTTING LENGTH 1.37 IN.; 2 FLUTE; RIGHT HAND HELIX; RIGHT HAND CUT; ARBOR LENGTH 4.20 IN.; ARBOR DIAMETER 1.374 IN.; ARBOR TAPPED 3/8-16 TO LOCK END MILL SHAFT; TOOL TO BE USED WITH RIGHT ANGLE QUACKENBUSH POWER UNIT; USED TO REPAIR 68A11002 WING TO FUSELAGE ATTACH LUGS, WITH PROVISIONS TO BORE AND REAM FINISHED SIZE HOLES IN WING SPAR LUGS AND LUG BUSHINGS AFTER INSTALLATION"