| X-Circle | Logo used by Duro-Chrome |
| X-Ray Fluorescence | See also XRF |
| X4 Tools | Company Profile |
| | Torque Multiplier, TD-1000 |
| XCELITE [logo] | Trademark for Park Metalware |
| XELA | Trademark for Klein, M. & Sons |
| XRF | Principles of |
| | Tests of Alloy Content |
| Xcel | See also Park Metalware |
| | Adjustable Drain-Plug Wrench, 6 Inch |
| Xcelite, Inc. | Successor to Park Metalware Company |
| Xcelite | See also Park Metalware |
| | Nut Driver, HS-11 11/32 |
| | Nut Driver, HS-18 11/32 |
| | Nut Driver, No. 6 3/16 |
| | Nut Driver, No. 6 3/16 Early |