Our part # TEC-22253S TE holders feature the minimum gauge length possible in order to provide maximum ridigity while cutting. They also provide added Z clearance, and are used with standard ER collets. Balanced to 25,000 RPM at G2.5 Best T.I.R. and Z axis of any collet chuck

Techniks CAT40 ER32 SuperRIGID Collet Chuck x 3/4" Shank Length