Description: Precision Collet Chuck Holder CNC Milling Tool With Wrench.    Specifications: Material:Metal;  Size:16cm/6.3 inch;  Drawbar thread:7/16;  Precision:0.01;  Clamping range:1-20mm;  Spanner/wrench:1pc x 45-52;  Suitable For:dedicated machine.    Features: -ER Straight extension rods, shank body longer for deep hole machining.  -Straight-type handle body, for holding small drilling, milling tools.  -You can reduce the use of longer tools, which can reduce costs , improve efficiency.  -Stability diameter, and other parts have been precision ground to eliminate unbalance.  -Durable, high precision, tighten the nut straight, high rigidity, strong clamping.  -Collet must be assembled into the clamping nut before inserting into the chuck.    Note: 1. Before using this tool, please measurement tool deflection, tool deflection accuracy exceeds 0.0005", please correct before cutting.  2. The tool extends the length of the chuck as short as possible, the tool extends the amount of time longer if extended, please cut their own speed, feed rate or cutting the amount.  3. If the cutting of abnormal vibration or sound, cut spindle speed and depth of cut to improve the situation so far.    Packing Included: 1pc x Collet Chuck;  1pc x wrench