Bureau Reference Scale

Made to meet rigid FBI specifications, the Bureau scale set contains a 15 cm x 30 cm L-Shaped scale and a 15 cm straight scale. The scale set provides maximum contrast by featuring black markings on a white background on one side and white markings on a black background on the reverse. Alternating black and white bands provide an excellent visual reference from a distance and crosshairs at each end provide a means for checking and correcting perspective distortion. The L-shaped scale is rigid and will always provide an exact 90 degree scale.