| Business | Phone |
| Castle Machine Co 5865 Bullitt Rd, Greencastle 17225 | (717) 369-3184 |
| Mitchell Machine Shop Inc 550 S Antrim Way, Greencastle 17225 | (717) 597-2157 |
| Null Machine Shop Inc 95 Commerce Ave, Greencastle 17225 | (717) 597-3330 |
| R & L Machine 501 S Cedar Ln, Greencastle 17225 | (717) 597-5080 |