Stereo Microscope Universal Bracket Arm 360 Degree Rotating Xtended For Eakins Binocular Trinocular Microscope Feature: The multi-axis rotation feature allows this stand to locate your microscope head to most any position or angle. This can be a greatly needed tool when you have a hard-to-see location such as inspecting and searching for cracks on the solder of a circuit board. Arm length: 29mm Suit for Dia 25mm Focusing Holder hole Package incluede: 1 x Multi-axis Adjustable Metal Arm