This micro screwdriver from Proxxon is light and easy to handle, and the well positioned rocker switch provides on/off/reverse. The quality ROHM three jaw chuck accepts bit shanks of up to 6.5mm. The torque range is in six stages from 0.35-2.0 Nm. Supplied complete with the following 16 insert bits of chrome molybdenum steel. Slot: 0.3 x 1.5 / 0.35 x 2.0 / 0.4x 2.5mm. Philips: sizes 0 and 1 Torx: T6, T8, and T10. Hex key internal: 3.0 / 3.5 / 4.0 / 4.5 / 5.0mm. External: 1.5 / 2.0 / and 5.0mm. N.B. This unit can also be used for small thread cutting with suitable taps.We recommend the use of a MICROMOT mains adaptor of at least 2.0A.