Clicking, internal square for interchangeable plug-in tools, quick release-safety lock, fast, accurate setting using QuickSelect-adjustment, double-stop signal, very easily readable two-tone double-scale division in Nm/ft.lb, return to "0" is not necessary, as the measuring element is loaded only when tightening, counterclockwise use by reversing the plug-in tools, pulling after the “click” or load against the function direction, eg. loosening seized bolts do not affect the measuring mechanism, i.e. the mechanism is not damaged, 2-component grip with hand-friendly, green soft zone (resistant to oil, grease, fuels, brake fluid and skydrol), calibration with the PerfectControl calibration set no. 7794 or calibration installation no. 7706. If necessary, adjust without disassembly, with certificate, display deviation ± 3%