Forca RTGS-935 Argentium Silver Hallmark Curved Punch These Curved Marking Punch are used to mark inside Rings or virtually any other item that need to be quality marked and has been made from Argentium Silver These Marking Punch has been manufactured with German Hardened Steel. Argentium Silver 935 Stamp Size: 2.5mm x 1.5mm. Hallmark: 935, Overall size: 4- 100 mm., Weight: 1.38oz. ~ 39g., These marking stamps are lifetime guaranteed.