The Hultafors Quattro Bevel Square is an innovative adjustable square which also functions as a bevel square and an angle finder. The rotatable blade features fixed positions for 45°, 90°, 135° (180°, 225° and 270°). By rotating the blade more than 180° the opposite side of the stock where there is no slit can be used - for example, to provide a straight edge thin sheet metal cannot slide into. By shifting the lever, the Quattro can also be used as a bevel square to copy any angle between 0 and 270 degrees. A lever allows you to lock it at whatever angle you like. There is a scale on both the blade and handle to measure angles between 0 and 90 degrees. The square is also completely foldable, which makes it easy to store and carry in the pocket.

The blade is 45mm wide to accommodate work with standard stud dimensions and has a centre line making it easy to quickly mark out both sides of a stud. It also has scribing notches, spaced 5mm apart, which can be used to draw or cut a line parallel along an edge. A robust joint and a 2 cm long blade of 1mm thick, high-strength stainless steel provides a very durable design withstanding tough working environments, and will last a long time.

Carefully selected materials and manufacturing techniques such as a CNC-milled stock and a blade cut with a precision laser provide high accuracy; angle tolerance ±0.06° (±1 mm/m).