Without scale, can be set with an Allen key when the cap is unscrewed, using a torque tester. Torque adjustment not possible from outside; for use in series production; triggers gently and completely, overtightening not possible; non-fatiguing operation thanks to short trigger distance, clockwise and anticlockwise triggering; very light, handy and accurate. Hexagon socket for bits 1/4" C6.3 + E6.3. Repeatability ±6% according to DIN EN ISO 6789, with factory test certificate.