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This is the genuine patented Mark-A-Size. Beware of cheap copies on the market that are not as accurate and are poorly made.
Mark-A-Size enables you to accurately scribe cutting lines when reducing ring sizes, to avoid errors. The 12 sizes are graduated in quarter ring sizes from 1/4 to 3. Mark and cut the correct size every time. Hardened steel with sharp edges. Fan folds when not in use to protect edges.
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