Ring Stretcher in wooden box For the partially sighted_No - this Presidium "Digital refractometer"

- this Presidium "Digital refractometer" does measure refractive index but

Sit (or stand) at a comfortable distance from the object

For reading

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Ring Stretcher in wooden box For the partially sighted_No - this Presidium "Digital refractometer"Special clearance price while stocks last (once sold, there are no more) Handheld ring stretcher. Works by 'squashing' the ring around the outside as you turn handle. Includes 16 steel discs for ring shanks with thicknesses of between 4mm and 1mm. Yes it works fine but it's hard work compared with the large bench workshop models . However, as a low cost, simple, effective ring sizing machine go for it!