Keson RRT6 Top Reading Measuring Wheel, 4" x 1'Highlights: Dia. x Cir.: 4" x 1' Enhanced grip pistol type handle increases control and comfort Two reset buttons, one on the handle and the other on the unit housing Reinforced reset on housing protects wheel from accidental foot reset and brake on pistol grip instantly stops counting and adding lengths Collapsing hinge snaps into extended lock and it disconnects if you forget to press the unlock trigger Compact fold down reduces to 1 2 size for