- Strong and durable metal frame and body designed to withstand field use and demanding conditions. - Wide compatibility and flexible sizing: supports eyepieces with diameter from 35 mm to 60 mm, and works with 1.25-inch and 2-inch eyepieces. Suitable for telescopes, spotting scopes and monoculars, and can be used with microscopes that use the complete accessories set. - Complete accessories and precise workmanship: includes a full kit of microscope accessories, built for wide applicability and reliable performance with durable, stable operation. - Durable and stable performance: engineered for long life and steady viewing across different instruments and setups. Applications and use scenarios - Field observations: attach to portable telescopes or monoculars to sight and observe subjects outdoors with a sturdy, reliable setup. - Classroom and lab demonstrations: switch between instruments quickly and maintain stable alignment when using different eyepieces and scopes. - Hobbyist and multi-instrument setups: convenient for users who own several eyepiece sizes and instrument types, enabling broad compatibility with microscopes, telescopes and spotting scopes.