Unmatched Precision - Our new precision ruler offers unmatched accuracy for your panel layout tasks. Simply adjust the head to the desired angle and draw in a straight line. The head can be adjusted between 0 and 70 degrees and locks securely every 5 degrees (including 22-1/2 and 67-1/2), providing you with an accurate reference angle and length. Innovative Woodworking Edge Ruler - The secret of this T-square lies in a series of precisely machined indexing holes and spring-loaded, closely fitted indexing pins that engage them. The pins snap into the holes, assuring you of its accuracy. DIMENSIONS - Both edges of the blade feature laser-engraved inch graduations in 1/32 inch increments. The total cumulative error of the scale is .004 over the blade's length. The slender, satin stainless steel blade is easy to read and reduces parallax errors.