915 Generation 2 Pieces Of Ring Mandrel Ruler Finger Measuring Stick

Product details are as follows

Very suitable for use on glass display cabinets
Graduation ring mandrel
The measurable size of the measuring ruler is 38.9 (diameter 12.4) to 74.1 (diameter 23.6) mm, a total of 33 sizes
The size error between the ring and the ruler is 0.25.
Annular sizing device mandrel is made of stainless steel, American standard, easy-to-read mandrel size chart (for full size and half size)
The rubber hammer and metal ring stick and ring adjuster set are perfect sets for jewelers, ring makers, hobbyists and everyday users. For convenience, the annular drill rod has a non-rolling design, so you can place it wherever you want.
Colour:Gold + Silver
Material:Copper
Size:24.5cm
Package Contents:
1* Metal copper rod
1* rubber hammer
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Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-38883cm.