These Polaris® mirror mounts use a monolithic flexure arm or a flexure spring and locking setscrew combination to hold the side of the optic. This method provides both high beam pointing stability and low optic surface distortion. Stainless Steel Mounts are available for optics from Ø1/2" to Ø3" and Aluminum Mounts are available for Ø1/2" and Ø1" optics.