This high revving proxxon micromot ibe professional drill grinder is a special balanced low noise dc motor has fullwave electronic speed control the ground steel spindle runs in a ball bearing six high concentricity micromot collets 10 15 20 24 30 and 32mm and closure nut are included it is a professional fast machine with special balanced motor continuously variable electronic speed control full wave electronics ground steel precision shaft on ball bearings for hig