Drive Torque Angle Gauges are required when servicing many late model engines that use torque-to-yield fasteners. OTCs No. 4554 1/2" Drive Torque Angle Gauge measures angle of rotation after pre-torque in torque-angle applications. The 360° scale is marked in 2° increments and intervals of 10° and 30°; easily zeroed for next application by turning the tool housing. Has 1/2" male and female square drives. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it’s a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians’ productivity and shop profits.