Large clamping force and wide clamping range. Widely used in drilling, milling, tapping, carving, CNC, and other machining applications. Instructions for use: Pull the pressure cap, gently rotate the rod, align the eccentric part of the groove, and push the holder evenly in the direction of A to install the pressure cap. Install the retainer and cover onto the puller or machine tool spindle. Clean the cylindrical shank of the tool and insert it into the clamping hole. Use a wrench to tighten the pressure cap evenly before using the tool holder. Note: Avoid installing tools on the adjustment pressure cap to prevent damage to the tie rod. When replacing the tool, loosen the cap with a wrench to remove the chuck and tool. Remove the tool, push the rod in the designated direction to take it out, then insert the rod into the next hole. Name: BT40-ER32-70L Milling Shank Color: Silver + Black Material: Steel Package Contents: 1 x Spring Collet Chuck Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.