| Business | Phone |
| Trunnell & Sons Welding 14650 Southlawn Ln # 5, Rockville 20850 | (301) 217-5959 |
| Celtic Enterprises 647 Lofstrand Ln # H, Rockville 20850 | (301) 838-3400 |
| Richard Lewis Welding Svc 6905 Keats Ct, Rockville 20855 | (301) 840-0253 |
| M L Hippert 1350 Baltimore Rd, Rockville 20851 | (301) 309-9662 |
| Iwc 14672 Southlawn Ln # G, Rockville 20850 | (301) 424-5662 |