1. Simple Assemble, easy use, low price with high quality;2. Good Tool for handyman to DIY their own handcraft, can be using drill on woods, aluminum,PCB,Acrylic board, plastic, etc;3. Universal keyless chuck allows you quickly and easily change accessory bits on your Grinder;1. About Motor: Rated voltage - 12 volts DCMotor will run on DC voltage from 3-12 voltsNo load speed 18000-35000 RPMNo load current - 1A.shaft diameter:2.3mm 2. About Golden chuck with 5pcs collet:Type:High precisionDrill Collet Size: 0.5mm, 1.0mm, 1.2mm, 1.5mm,1.8mm,2.0mm, 2.4mm, 3.0mm,3.2mmDiameter of backshaft (match the motor shaft): 2.3mm3. About Twist Drill Bits:Design: Straight ShankDiameter: 0.5/0.8/1.0/1.2/1.5/1.8/2.0/2.3/2.6/3.0mm(each size one pcs)Colour:silverMaterial:MetalPackage Contents:1 x Motor1 x Golden chuck with 5pcs collets1 x Small wrench10 x Twist Drill BitsOnly the above package content, other products are not included.Note: Light 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.