Sliding plate manually positions Adjust-A-Ball Mirror Mounts AB1 and AB5 in X or Y direction. Additional items, such as posts, can be secure item to sliding plate using an #8-32 or M4 socket head cap screw from underside. Sliding plate is secured to optical bench with either two ¼-20 or M6 screws: ¼-20 screws allow 1.25” travel M6 screws allow over 50 millimeter travel
