Used for measuring the freeplay angle and rock of dual-mass flywheels. Freeplay angle is the angle at which primary and secondary flywheels can be rotated against each other until load is exerted on the arc springs. Rock describes the clearance between both DMF masses which allows them to be tilted towards and away from each other. Contains: (Qty.) (1) Degree Gauge with Bar, (1) Degree Gauge Locking Bar, (1) Dial Gauge, (1) Dial Gauge Stand, (1) Ring Gear Locking Dog, (2) Ring Gear Locking Dog Spacers, (6) Adapters, (1) Instruction CD.