Rotating optical table posts are devices that hold the optical element attached to it at the desired height and angle.
These posts are designed for mounting optomechanical components in custom configurations. By using a combination of a tapped construction post along with a counterbored construction post, components can be mounted at an arbitrary angle to keep your beam path unobstructed.
The part 2 offers five M4 counterbores and a mounting flat while the part 1 offers three M4 tapped holes and a mounting flat. The posts can be combined by using an M4 cap screw. Additionally, a single post may be used to mount an optomechanical component on its side using the mounting flat on each post.