When open, the cut out square on the base is marked along all four sides in Imperial or Metric scales. (It is still a surprise, or is it, that we sell ten times as many Imperial models than Metric)! This enables the number of threads and weave to be counted to the inch (or centimetre) and therefore to determine the quality and strength of the material.
The OptiSIGHT magnifying visor provides hand-free magnification for more accurate and efficient viewing. The visor tilts up for normal viewing or down for magnification. The OptiSIGHT brings work closer into focus, reducing eye strain and fatigue. The unique design of the head band allows the OptiSIGHT to be taken on and off with ease.
Available in blue or green.