| Business | Phone |
| Bits & Chips Machining Inc 100 Edison Dr, Middletown 45044 | (513) 539-0800 |
| Donisi's Custom Tool & Die 6831 Franklin Madison Rd, Middletown 45042 | (513) 422-1397 |
| Future Vision Manufacturer 4765 Emerald Way, Middletown 45044 | (513) 705-0010 |
| Hall Machine & Tool Co 8 Kenec Dr, Middletown 45042 | (937) 743-8278 |
| Middle Supply Co 3121 S Verity Pkwy, Middletown 45044 | (513) 425-9221 |
| Mokry-Tesmer Inc 707 Mary Etta St, Middletown 45042 | (513) 424-5135 |
| Mtr Martco 3350 Yankee Rd, Middletown 45044 | (513) 424-5307 |
| Orman's Welding Center 3344 Yankee Rd, Middletown 45044 | (513) 422-1999 |
| S & R Machine Shop 6669 Georgetown Ln, Middletown 45042 | (513) 424-2593 |
| Whitt's Machine Shop Inc 806 Central Ave, Middletown 45044 | (513) 423-7624 |