Stanley PowerLock 12'
Exclusive Powerlock feature gives positive blade lock with no creeping. Slide lock is up front for easy operation. Takes standard replacement blades or complete replacement cartridges(inch rules only). Life guard yellow blade, protected with DuPont Mylar to reduce friction is easy to read and takes 3 to 10 times more abrasive wear than other blades. Graduated in 16ths of an inch on both edges of one side. Stud marking every 16". Belt clip is fastened on back of case. Data tables incorporated on back of 10, 12 and 16' blades.