LT-5 Professional Quality Metal Linen tester Electro-Optix with fixed focus 1” 17 diopter 5x magnification lens. Has a one inch square measuring field with 1/8"and 1MM increments for those precision measurements. Used for measuring, checking linens, ballistic materials, gem cutting and inspecting, and printers and graphic artists. Carrying case included. Our Finest Quality Professional linen tester.