·It can save you so much time and heart ache when you can't adjust just by guessing ·Close to adjusting the drum brakes on your truck. used this and got them really close, put the drum back on, and adjusted them a little tighter.Easier than adjusting manually without it. ·For an older drum style brake job that didn't have the adjuster window for the rear brakes. Able to set the shoes to proper setting with this tool.