Proxxon 34108 Micro Mill FF 230 Hand wheel serves as both height adjustment and fine mill feed Poly-V drive system provides speeds of 280, 550, 870, 1,250, 1,700 and 2,500-Rpm Precision engineering produces dimensions of 20-Inch overall height, table size of 10-5/8-Inch by 3-5/32-Inch and 41-Pound