STEP AND GAP GAGE, 0-.5"/0-12.7mm 2168-12 Product Description Measure step height and gap width. Res: .0005"/0.01mm. Buttons: on/off, zero, inch/mm. Automatic power off, move the digital unit to turn on power. Battery CR2032. Data output. Made of stainless steel. Supplied with zero setting block. Video Link - https://youtu.be/V0oYfirdXgU Product Information - http://www.acroenterprise.net/products/category/step-and-gap-gage/1