LT-8D 8x Linen Tester Professional Double Lens Quality Metal construction with fixed focus 3/4” 8x magnification lens.Has an industry standard 3/4 inch square measuring field with both 1/8"and 1MM increments for those precision measurements. Used for measuring, ballistic materials, checking linens, gem cutting and inspecting, CSI fingerprint and fluid examination, printers and graphic artists. Carrying case included.