The Quattro adjustable square has a millimetre scale that can be set at three positions (45° , 90° and 135° ) and has a tolerance ± 0.06° . It can also be folded making it easy to store and carry.

The stock is made of anodised aluminium, the blade is 25 cm long x 45 mm wide and made of stainless steel, with the scale being deep-etched and extremely hard-wearing.