| Business | Phone |
| Gold Crest Engraving 9165 Independence Ave # A, Chatsworth 91311 | (818) 764-3231 |
| Hartt Engraving Co 9810 Owensmouth Ave # 9, Chatsworth 91311 | (818) 709-4790 |
| Precision Mark Technologies 9666 Owensmouth Ave # K, Chatsworth 91311 | (818) 718-1320 |