Each foot mark is indicated in braille and every 6 inches is marked with single raised dots on the lower edge. 6-inch white rigid plastic tactually marked extension is for measuring up to 6 inches long in increments of half inch and one inch markings. Flexible steel ruler with push-button blade return and lock. Durable metal case plus belt clip. Case is approximately 3-1/4 square with rounded corners. Modified braille version by MaxiAids.