Straight grinder is a hand-held, electrically operated tool, that is designed to be used by professionals at machine shops for grinding, polishing, sanding or buffing applications. Plain grinding wheel is attached to this tool, which is suitable for all material. The shelf life of this grinding wheel is limited. This tool belongs to single class of tool, which means it is designed to perform only one task. HD1290 E is a 100mm straight grinder with 100mm wheel diameter, 5800rpm no load speed and 6.7Kg weight; P7791LH E is a 150mm straight grinder with 150mm wheel diameter, 6500rpm no load speed and 7.6Kg weight.