MAT WHEELS MANUFACTURING BENCH-TOP w/BEARING SIZE GUIDE 12x12.75in BLACKDesigned specifically for keeping workbenches clean and organized while working on bikes An extra large work area, compartments for parts, tools, and components, so everything is within reach and easy to find Features Useful tools built in like metric and imperial rulers, ball bearing and sealed bearing gauges which make it easier to identify the parts you need Identifying ball bearing has never been easier with this ramped gauge that lets ball