Donegan OPTIVISOR MASTER SET 6 Lenses + Loupe Case Medical Precision Jeweler Description OptiVISOR is a precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain?leaves both hands free and allows three dimensional vision. Used by anyone whose profession or craft requires close accurate work. Can be worn over prescription or safety eyeglasses. Optical glass prismatic lenses: Ground and polished to precision optical standards?bevel edged and mounted in an interchangeable plastic frame It tilts: Adjustable pivots allow the visor to be tilted out of the way when not needed and at your fingertips when you need magnification Adjustable headband: Conforms to fit all head sizes?fabricated from a special blend lightweight material. Comfortable when worn for long periods of time. High impact visor: Provides a tough, durable, always-new appearance Genuine leather comfort band: Padded orthopedic felt adds to comfort Kit set includes: Durable, comfortable OptiVISOR assembly. Six lens plates, 1.5X to 3.5X, focal lengths range from 20? to 4?. OptiLOUPE? adds 2.5X magnification. Impact-resistant case for storing all included pieces. SET INCLUDES ALL 6 LENSES LOUPE Item No. Focal Length Magnification DA-2 20? 1.5 times DA-3 14? 1.75 times DA-4 10? 2 times DA-5 8? 2.5 times DA-7 6? 2.75 times DA-10 4? 3.5 times DOES NOT INCLUDE VISOR LIGHT *PLEASE NOTE ALL SERIAL NUMBERS HAVE BEEN RECORDED PLEASE EXAMINE ALL PHOTOS AS THEY ARE AN INTEGRAL PART OF THE DESCRIPTION KINDLY ASK ALL QUESTIONS PRIOR TO PURCHASE