NEW SIMIS MFG'D BY TECHNIKS PRECISION ER 32 COLLET CHUCK. THIS TOOL HAS A 4 GAGE LENGTH. BALANCED TO 18,000 RPM. THIS HOLDER COMES STANDARD WITH A SLOTTED NUT. 0.0002 OR BETTER FROM TAPER TO COLLET POCKET. TAPER GROUND TO AT3 OR BETTER. CUSTOM PACKAGES AVAILABLE UPON REQUEST CAT 40, CAT 50, BT, METRIC SIZES, ULTRA PRECISION ETC.