I get today a answer and that what i need is a friction gauge from stahlwille. Indicating torque wrench with permanently attached square drive and trailing pointer dial. No needle wobble during measurements. Lightweight construction through use of aluminum and cost over $500 !!!

code 50240015EAN
code 4018754163830
EClass 5.1 27201701
SF mm 0
Scale Range 2-15 Nm
Scale Division 0,5 Nm
Outside Square " 1/2
b mm 72
h mm 50
L mm 298,5
LF mm 250
Weight g 676

Max