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| 20140363244 | Allen | Dec 2014 | A1 |
| 20190329331 | Parendo | Oct 2019 | A1 |
| 20210197295 | Ward | Jul 2021 | A1 |
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| https://www.steelvisiontools.com/products/5pc-cobalt-stepped-drill-bit-set/ (Year: 2022). |