The HVM-S1i Vertical-Drive Industrial Mirror Mount is unlike any optical mount in its class. Its body is made entirely from stainless steel, allowing it to be exceptionally stable. The HVM-S1i is designed to hold 1” optics and is loaded from the front. Adjustments are made via two top-accessible 100-TPI adjusters which are lockable. Two alignment pin holes are provided for keying the mounting position.