Brunton Ball and Socket Head used with tripod 3051 or 3060..

Adjustable needle locking mechanism with two positions:
Unlocked - releases the needle for azimuth readings. Locked - momentary release of the needle for strike measurements by pressing and holding the release mechanism, then lock the needle for reading by releasing the mechanism.

Features

• Exclusive mount for all Brunton transits
• Best works with Brunton 3051 non-magnetic tripod
• Adjustable for azimuth and vertical angle measurements
• Manufactured using non-magnetic aluminum and brass
• Standard 1/4 - 20 thread for mounting