
I think these screws are actually an improvement over the original screws found in economy tool holders. On them, the key fits the socket better than the original, as if the socket was deeper? If you use carbide indexable inserts, you should have them in your tool box.

OSCARBIDE Carbide Turning TCMT090204 Replacement
4 Review

π§ Accusize Tools Carbide APKT1604 0056 1604X10: Superior Quality and Precision Cutting Performance
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Excircle Indexable MTJNR1616H16 MWLNR1616H08 MCLNR1616H12
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π Suppliers of Tungsten Carbide Cutter Inserts
3 Review