1. Large clamping force and large clamping range. 2. Widely used in drilling, milling, drilling, tapping, carving, CNC and other processing Instructions use Pull the pressure cap, gently turn the rod, place the eccentric part of the groove in the groove, and push the holder evenly in the direction of arrow A to wear the pressure cap. Install the retainer and cover on the puller or machine tool spindle, clean the cylindrical handle of the tool and insert it into the clamping hole. Use a wrench to tighten the pressure cap evenly until you can use the tool holder. (Note: And avoid installing tools on the adjustment pressure cap, so as not to damage the tie rod) When the tool is replaced, loosen the cap with a wrench to remove the chuck and tool, remove the tool, push the rod in the direction of the arrow, take it out, then you must put the other holes into a cane. Name: BT40-ER32-70L milling shank Colour: silver + black Material: steel Package Contents: 1 * Spring Collet Chuck Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.