Made by AIT, the OPTICALPLUS has the highest magnification (4X), clarity and lighting capability available---surpassing anything you have used in the past. OPTICALPLUS provides full vertical adjustment and 360-degree rotation within the threads. This allows for perfect alignment between the instrument and threads for ease of use and performance during inspection. Industry-leading features include: Rugged, anodized, aluminum construction. Adjustable focusing for clearer and brighter viewing. Adjustable light intensity for differing surface reflectivity. 4X magnification for the closest thread view possible. Single unit capable of inspecting: SCUBA, Medical, SCBA, AFV, Industrial Speciality Gas and CO2.