Starrett W640JZ Wireless Electronic Depth Gage
This W643JZ Wireless Electronic Depth gage includes the W2900-5-1 Wireless Indicator for a digital readout and wireless data collecting option. The contact is slightly up into the base at rest. In action, the inspector sets the contact at zero, which is usually at the bottom of the base. Then the top button is pushed down to contact the work and the measurement is taken. All bases are 2-1/2in long.