Proxxon 28512 12-Volt Micromot 50 EF Rotary Tool Slim, easily handled and light rotary tool Stable housing made of glass-fiber reinforced polyamide, with a soft handle Quick-action chuck and electronic revolutions adjustment with feedback effect Special, balanced, low noise dc motor with high life expectancy Practical for use with different shaft diameters measures 1/32 inches to 1/8 inches