Brown Sharpe TESA 00591008 TWIN-CAL Wireless Bluetooth Set 6"-150mm IP67 Digital Caliper with Depth Base. Consisting of00590092 47473 Brown & Sharpe TWIN-CAL 6"05.60013 42534 T-Bar Depth Base for use with 6-inch caliper04760183 76653 TESA TLC-BLE STARTUP SET