TECHNIKS 23 PC ER40 COLLET SET METRIC 4MM - 26MM X 1 MM .0002 ACCURACY MILL
The most accurate ER40 collet in the industry- average 0.0002" Total Indicated Runout (T.I.R.)! Techniks part # 04206MS. Others T.I.R. 0.0060" - TECHNIKS T.I.R. 0.0002". Precision ground and hand inspected.