Grid pattern helps determine proper scale. Quotation 7x adjustable focus lens provides flat, distortion-free image.
Transparent body allows illumination.
Quotation 7x adjustable focus lens provides flat, distortion-free image. Transparent body allows illumination. Quotation 7x adjustable focus lens provides flat, distortion-free image. Features metric scale, 20mm in .1mm increments. Transparent body allows illumination.