For precision drilling, milling, sanding, polishing, brushing, rust removal, engraving and cutting. Includes keyless chuck (capacity 1/64" - 1/8" (0.3 - 3.2mm). A precision ball bearing minimizes spindle side play. Spindle lock button for bit changing eliminates the need for spanners. Recessed spindle head for inserting MICROMOT steel collets. Special, balanced, low noise DC motor with high life expectancy. Variable speed control with feedback effect (high engine power in the lower revolutions area). Housing of glass fiber-reinforced POLYAMIDE. Technical data: Direct voltage 12 - 18V. Maximum power consumption 100W. Speed 3,000 - 15,000rpm. Length 7.3" (185mm). Weight 1lb (450g). We recommend the use of MICROMOT transformers of at least 2.0A. Note: The speed control of our 12 volt devices only works when operated via non-stabilized power supply units (e.g. all MICROMOT mains adapters). Connection to stabilized power supply units is possible. However, the devices will then operate with maximum rotational speeds (also applies to operation with batteries).