Feature●0.1635" diameter (+.0003" /-0" ) carbide tipped chucking reamer●4" overall length●0.151" shank diameter●4 Flutes●1" length of flute with 1/2" carbide lengthDescription Super Tool, Inc. 56551635 0.1635" Diameter Carbide Tipped Chucking Reamer, Made in the USA