The Longacre Advantage Roller on One EndFor faster, easier measurements. Tight Tolerance TubeTight tolerance inner & outer tube for more accurate readings with no 'slop' Extra Long Billet ArmsLonger 9-3/4"" arms for wider tiresThick 3/8" T6 Billet for extra rigidity (some other brands are 1/4" or less) Bolted TogetherNo welding distortion - Anodized red. Scales on 2 SidesEasy to read with the tires on the car or on the ground. Reads to 1/8" IncrementsFrom 62" to 110" (most others only read to 1/4") Accurate stagger measurements are vital for consistent handling. This gauge is different from others on the market, from the precision inner and outer tubes of 6061 T6 aluminum extrusions to the 3/8" thick T6 Billet arms with a roller in one end this tool will give you the accuracy you need to run up front.