ITEM NAME:0.3-4mm Universale Elettrico Drill Chuck Trapano Mandrino Pinza 3mm Shank N E8C3 0.3-4mm Universale Elettrico Drill Chuck Trapano Mandrino Pinza 3mm Shank N E8C3 N5X4 0.3-4mm Universal 3mm Drill Chuck Connecting Rod Engraving Conversion Available in the grinding machine (dental drill) and other equipment. How to use : First governor speed adjustment in the "minimum or zero turn", then turn on the power, adjust the speed, speed not more than 1w, to avoid damage to the shaft. Caution : Once installed on this universal chuck. Please do not direct adjusted to high-speed operation, or may cause the rear axle bend. Drill Chuck Dia : 0.3-4mm Connecting Rod Dia : 3mm Color:silver material: metal Package includes : 1 x 3mm drill chuck 1 x Connecting shaft 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.