Description: Voltage: 110V, 0.1A Power: 65W Rotating speed: 4200r/min Working table size: 165x165 mm Machine size: 195x195x160 mm Rotating shaft in grinding table (fine shaft with grinding head): diameter 0.7cm Grinding wheel inner diameter: 0.79cm Operation: 1. Can not grinding without water. Ensure the grinding wheel is wet 2. When using the grinding wheel, with small strength , don't use too much strength.Too much strength will reduce grinding machine and the service life of the grinding wheel. 3. After using, clean the water reservoir. Remove the reservoir, clean up the rest of the residue after grinding. 4. In order to prolong the service life of grinding machine, cleaning and add lubricant to the engine shaft, 25 hours after each use, remove all the grinding wheel and the fixed screw. 5. If the grinding wheel not be used for a week or longer,it need to grind down on stage to prevent the direct axis stick on. This will help you to develop check engine shaft and wheel maintains a habit. 6. Don't grinding metal. If grinding metal, it will damage the grinding wheel and result in can not grinding glass any more. Package included: 1 x Glass Grinder 1 x 5/8” diamond grinder bit(MCBL58Grinding Wheel)