The Aven 26800B-553-577 Articulating Arm Stand with Focus Mount and 360 Ball Joint is for use with Aven Digital Microscopes. It features a 415 mm (16.33 in) articulating arm with two articulating joints on a 450 mm (17.7 in) post. The 16.3 inch articulating arm can be secured to any point along the 17.7 inch post. The two articulating joints can be rotated to the ideal position, and can be used to move the microscope out of the way when not in use. The arm can be raised and lowered and rotated to the ideal position. The built-in table clamp secures to the side of work bench, featuring dual locks for added stability. The focus mount features two knobs for smooth vertical adjustment, and a ball joint for 360 degree movement with a tension lock. The 1/4-20" universal screw adapter is compatible with the following Aven cameras: Mighty Cam USB (26700-244), Mighty Cam Pro (26700-258), and Mighty Cam ES (26700-259).