High Precision 15 Pc. Round 5C Collet Set 1/8-1" x 16ths Hardened T.I.R. 0.0005" Lathe Our Part # ALL-41282 High precision 15 piece fractional 5C collet set includes 1/8-1" x 16th increments Made of high grade tool steel. Hardened and precision ground. Threaded internally and externally Guaranteed T.I.R. 0.0005"