Eschenbach Frames With 3X Flip-Up Binocular Magnification-7" Focal Length Mitutoyo Replacement timer knob for Best

Replacement timer knob for Best Built magnetic tumbler machines

Includes 32-minute instructional DVD

Fine-quality optical glass by Harald Schneider

start with coarse cut brown pyramids

8mm outside diameter and a 3mm setting burr

Eschenbach Frames With 3X Flip-Up Binocular Magnification-7" Focal Length Mitutoyo Replacement timer knob for BestEschenbach mounts these flip up binocular magnifiers in a premium quality frame designed for extended wear at the bench. The frame is lightweight and comfortable and can be adjusted to fit by gentle warming and bending. The lenses are constructed from high quality fiberglass filled plastic and are fully interchangeable, allowing you to purchase one frame and lens combination and expand your magnification options by adding additional lenses separately.