A brake shoe adjustment gauge is an inside-outside measuring device that is also known as a brake shoe caliper. During drum brake servicing, the inside part of the gauge is placed inside a newly surfaced drum and expanded to fit the drum diameter. The lock screw is tightened and the gauge moved to the brake shoes installed on the backing plate. The brake shoes are then adjusted until the outside part of the gauge just slips over them. This gives a rough adjustment of the brake shoes. Final adjustment must still be done after the drum is installed, but the brake show gauge speeds up the process.