A high quality instrument of robust, reliable metal construction and excellent optical performance. Highly recommended for Primary Science Education and Field Study Centres ( officially approved by the Royal Microscopical Society for use in primary schools). Extremely simple to use, the PM-1 is ideal for the examination of everyday objects in fascinating yet understandable detail. The 'anti-tamper' student-proof design includes 'locked-on' eyepiece & stage clips and a slip-clutch on the focus movement. Also an extremely useful routine inspection microscope for use in industrial applications.