Fowler 74-150-020 EZ-Drum Electronic Brake Drum Gage<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>4 inch to 20 inch/100mm to 500mm capacity</li><li>Inch/metric/fraction conversion</li><li>4 inch drum preset， zero set， hold function</li><li>Preset depth at 1 inch and 1.5 inch</li><li>Resolution of .0005 inch/.01mm (fractions in 1/64 inch increments)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/21F1jJAtHUL.jpg" noproxy>