This block is used to hold your ring and prevent flattening the band while you stamp your makers mark or metal purity on the inside of the ring.
The grooves can be used for flat, rounded, angled top, knife edge, D-shape, comfort fit, and other shaped bands.
Block measures:
3 x 1.25 x 0.6 Inches
7.5 x 3 x 1.5 Centimeters
(3 Piece Minimum)