Supports the following standards: ASTM D4318, AASHTO T89, AASHTO T90 Unit consists of brass cup, cam mechanism, carriage and crank mounted on a hard rubber base. Includes H-4229 ASTM grooving tool and gauge block. Crank can be shifted to right- or left-hand operation. Complies with ASTM D4318; AASHTO T89, T90.