One number heavy duty straight grinder (product type: die grinder) specification:no-load speed : 25000 rpm, power -500w, voltage - 230v, frequency: 50 hz,collet : 6 mm, electricity connection: single phase, weight (approx.): 1.9 kg. suitable for different shape grinding stones like as - pencils, cylindrical and conical stone. this one number should contain (a). pencils stone qty 02 nos,(b) cylindrical stone qty 02 nos and (c). conical stone qty 02 nos .total qty -10 nos