Feature●0.309" diameter (+.0003" /-0" ) carbide tipped chucking reamer●6" overall length●9/32" shank diameter●4 Flutes●1 1/2" length of flute with 1/2" carbide lengthDescription Super Tool, Inc. 56553090 0.309" Diameter Carbide Tipped Chucking Reamer, Made in the USA