This unit is reminiscent of drill/drivers of 50 years ago (before cordless drills). The unit consists of a collet-type chuck and handle with a spiral shaft. Pushing the handle towards the job causes the collet to rotate. This would enable a drill (or screwdriver bit for that matter) to very gently and slowly rotate. It is ideal for very fine work and does need some practice to perfect your technique.
Features:
• Includes 2 pin vice collets: 0.3-1.0mm & 1.8-2.6mm
• Also 3 small drill bits in tubular case