The Dent Fix DF-PG213 Perfect Gap Gauge removes the guesswork from setting the accurate gap width when aligning body panels and hoods, allowing the technician to set the width to the factory specifications. The felt covered magnets provide a solid mounting point on steel panels and the reverse side has a suction cup for aluminum and plastic panels. After adjusting the horizontal bar, the appropriate number of gauge tabs can be positioned in between the gap. The gauge has 10 alternating black and white tabs, each tab is 1mm thick with a maximum gauge depth of 10mm. This tool works well for hood, trunk, and door alignment or panel replacement and fitment.