INSIZE Digital Thickness Gage with Roller Contacts This gage offers a quick and efficient means of inspection with their convenient grip handle, thumb trigger and spring-loaded spindle. The Roller Contacts that are included on this gage allows for constant contact on thin materials as you move the gage along your material. Features Include... 0-.18" / 4.5mm Measuring Range 0.0005" / 0.01mm Resolution 0.591" Roller Contact Width +0.001" Accuracy ON/OFF Inch/mm Conversion Data Preset ± Direction Changeover SPC Output