• Take any measurement in under 10 min. • The most accuratet, affordable, compact, portable laser alignment tool• Two easy steps to tractor trailer wheel alignment - align leading axle to 5th wheel pin, then align trailing axle to leading axle• E-Z precise axle and wheel alignment• For heavy trucks, all types of trailers • Multi-purpose measurement capabilities• Includes: (4) Magnetic Self-Centering Lasers, 32"/10M Measuring Tape, (2) Magnetic 5th Wheel Pin Adapters, Durable Storage Case