The original Block Scribe with preset dimensions of 3/8, 1/2, 5/8, 3/4, 7/8 and 1″ to correspond with sheet material thicknesses.  Includes 1x HB Staedtler pencil. 
 
Block dimensions – 1 3/8″ x 1 3/8″ x 1 9/16″ H