Specification: Color: Red Speed: 4200r/min Voltage: AC 110V, 0.1A Working table size: 16.5x16.5 cm/6.5" x 6.5" Machine size: 19.5x19.5x16 cm/7.7" x 7.7" x 6.3" Suitable for grinding glass,ceramics and other hard and brittle material. Fit for: MCBL1(1"),MCBL58(5/8") Note: 1) NEVER GRIND DRY. Always make sure the sink which used for push the grinder bit automatic water is wet while grinding. 2) While using the grinder bit, use only light to medium pressure on the bit. Do not push material against bit using excessive force. Unnecessary pressure will shorten grinder and grinder bit life. 3) Clean water reservoir after each use. Remove water reservoir and flush out grinding residue around the sides of the base. 4) If the sink becomes dry, add water in timely. 5) Grinder bits should be removed from the machine if they are not in use for a week or more. This will keep them from “cementing” to the shaft. It will also provide you with the opportunity (and habit) of inspecting the motor shaft and bits for proper care and maintenance. 6) DO NOT GRIND METAL. Doing so will destroy the bit and make it unsuitable for grinding glass.