Rose Gold Drill Bits Function: 1. Large barrel: Polish thick nail and shortening 2. Mdndrel and sanding bands: Polish thick nail and remove callus 3. Small barrel: Polish thick nail 4. Safety bit: Polish nail side edge 5. Needle Head: Polish nail edge 6. Cone: Polish nail refers to skin Using Steps: Step 1: Plug in Step 2: Control the FORWARD/OFF/REVERSE button in the middle of the electrical cord to turn on/off. Step 3: Control the SPEED KNOB in the middle of the electrical cord to adjust speed. Tips: 1.Pls change the drill bit you want without tools before pluging in.Never move the drill bit during operation. 2.Just use attached nail brushes to clean your nails and bits after grinding. 3.For your safety,please adjust the handpiece to the lowest speed before changing rotation direction. 4.Don't let the nail drill work too long time, because you may feel hot even though aluminum body has a efficient heat dissipation. 5.Please place drills on the built-in stand when not in use, and stored in a dry location. 6.Don't rotate to open the body. Specifications: * Input Voltage Range: AC 100-240V/50-60Hz 0.5A * Output Voltage: DC12V 1A * Rated Voltage:DC 12V * Rated Current:0.16A * Speed: 0-20,000 RPM (adjustable) * Handpiece Length:13CM * Bits Size: 3/32"/2.3MM * Color: Rose Gold+Nail Brushes（purple+pink+blue） Package includes: 1 x Nail Drill Machine 6 x Nylon Wheels 6 x Drill Bits 3 x Nail Brushes 1 x AC adapter 1 x User Manual 3 x Rubber Rings Blue Specifications: Materials:High graded ABS 2 Modes:High & Low speed Color:Blue Grinding Head Diameter:17.5mm Dimension:13*4cm Packaging dimension:15*9*5cm Package includes: 1 x Electric Nail Trimmer 1 x Metal grinding head 1 x Cylindrical grinding head 1 x Precision grinding head 1 x Fine grinding head 1 x Rough grinding head 1 x Polishing grinding head 1 x Storage Case 2 x AA Batteries[Free gift]