All measurements can be taken in under 10 minutes. E-Z precise axle and wheel alignment. For heavy trucks, all types of trailers. Compact design, easy transport and toolbox storage. Multipurpose measurement capabilities Introducing the most accurate, affordable, compact, portable laser alignment tool! The "EZ Line" has many other uses in the Automotive and Commercial Vehicle Industry. The EZ Line makes obtaining alignment readings on most trailer types very simple and fast, from RVs to commercial trailers. A straight steel bar and bungee cord are all you need in addition to the EZ line, to set the toe on any vehicle, including trucks, that have an "in" or "Out" toe setting. Includes: 4 magnetic self-centering lasers, measuring tape, 2 magnetic 5th wheel pin adapters and a durable storage/travel case.