Electric Nail Art pen file drill, 6 optional bits (5 diamond bits, 1 grinding rod, 6 grinding bar) Install the bit: Turn the bit and press the button. Make sure the button is pressed. 2. Continue to press the silver button on the drill head and turn it counterclockwise to release the drill bit. 3. Insert the drill and turn it clockwise to secure it in the occluder. Note: Press and hold the silver key until the drill is firmly inserted into the lid. Specifications: Suitable for professional use, nail studio, makeup studio or home use - Dimensions: 16cm (L) x 2.4cm (hand piece diameter) Voltage: 220V - Plug type: US Plug includes: - Pedicure tool (used with grinder) : Shapes nails so that their edges are smooth. - Polishing tools: Polish nails to give them a healthy shine, suppress nail skin, stimulate nail growth - Plastic tools: smooth and dye particularly thick nails and nipple surfaces. Fine molding tools: Carve in hard-to-reach corners and areas - Cuticle push hands: remove dead skin. Keep your nails and skin clean and your gums clean. When replacing parts, remove tool 2. Do not use near or in water. If the engine falls into the water, unplug it immediately. Don't touch the water. Do not touch the drill after use. 5. If your teeth are too hot to touch with your hands, use protective glasses or a dust mask to prevent dust from getting into your eyes and lungs. Be sure to remove it from the power supply after use. If the machine is not in use, the whole tool must be kept in a dry place, away from children