Handy pocket gage is approximately the size of a thin pocket watch. Ideal for inspectors, purchasing agents and salespeople to check the size of materials up to 3/8" or 9mm thick. The gage fits naturally in the curve between the thumb and index finger. A slight pull on the serrated top plate raises the spindle. 0-.375" Range, 0-100 Dial, .001" Grad, Flat Contacts.