Align wheels with laser beam precision, without the dead batteries or cost of a laser, or the bulk of a really long straight edge. Even slightly misaligned wheels cause weird steering and handling. This simple, easy-to-use tool is the solution for accurate wheel alignment. The easy to read dual scale can be used with a bike on a rear stand, front stand, centerstand, side stand or no stand. A fast, accurate tool that will make your bike steer and ride better. Great instructions, too. 12"×1"×.4"