• Used to set the proper clearance between brake lining and drum prior to assembly
• Inside calipers measure drum diameters and outside calipers transfer measurement to brake shoes
• Knurled knob locks tool at measurement
• Diameter range: 6-1/2" to 14-1/4"
• Calibrated in 1/32" (1mm) increments

Since the beginning, GEARWRENCH automotive specialty tools have been driven by innovation. From their first specialty tool, the Model-T valve spring lifter, to their latest ratcheting puller, they have built their reputation with tools that make tough jobs easy. Most of their products have been upgraded with new improved features like dual material handles designed for a more comfortable grip or dual dipped handles on pliers providing more cushion for your hands. GEARWRENCH automotive specialty tools are proudly made with the finest components under the most stringent manufacturing guidelines. Made for everyday use guaranteed for life. Better tools mean easier, more efficient work so they constantly evaluate automotive engineering trends allowing them to consistently improve and enhance their tools to better fit professional hands. That's why they are the first choice for thousands of automotive technicians worldwide.