rational head dimensions of combination square with three adjacent flat faces, two of them meet square to one another, third face

inches alignment blade lock bubble carpenter tools carpentry cast zinc head check level clipping path close combination square common measurements copy space craft dimension equipment etched hardened scriber heavy duty highvisibility markings isolated background white tool measure measurement metal meter people precision quick adjustments rational dimensions ruler scale secure hold selfaligning draw bolt stainless steel woodwork woodworking working surfaces workplace three adjacent flat faces two meet one third face angled away 45-degree background