| Business | Phone |
| Fox Tool & Gage 4751 W Marr Rd, Howell 48855 | (517) 552-3100 |
| Advanced Productivity Solution 3292 E Coon Lake Rd, Howell 48843 | (313) 300-1686 |
| Twin Machine Inc 2020 E Grand River Ave 106, Howell 48843 | (517) 546-6117 |
| Ultra Tool Co 1305 Faussett Rd, Howell 48855 | (517) 546-8168 |
| Uni Boring Co 2280 W Grand River Ave, Howell 48843 | (517) 548-0500 |
| B P Machining 4381 Chase Lake Rd, Howell 48855 | (517) 223-7397 |
| Bader Machining 1251 Crestwood Ln, Howell 48843 | (517) 545-3149 |
| Berkley Machine Products 2280 W Grand River Ave, Howell 48843 | (517) 552-5800 |
| Sfr Precision Turning Corp 1323 Grand Oaks Dr, Howell 48843 | (517) 548-5393 |
| Christian Tool Co 4216 Grace Ave, Howell 48855 | (517) 548-3602 |
| Haigh Industries Inc 3540 W Grand River Ave, Howell 48855 | (517) 546-9501 |
| Devlon Manufacturing 2121 Dutcher Rd, Howell 48843 | (517) 548-4646 |
| Dun-Rite Machining Inc 1256 Fendt Dr, Howell 48843 | (517) 540-9930 |
| Orvis Machine Tool Inc 5253 E Clyde Rd, Howell 48855 | (517) 548-7638 |
| Graphitexpress 1010 Pinckney Rd, Howell 48843 | (616) 897-4540 |
| M & L Tool 4450 Golf Club Rd, Howell 48843 | (517) 546-6882 |
| Livingston Machine Inc 10561 Oak Grove Rd, Howell 48855 | (517) 546-4253 |
| J C Kiefer Enterprises 5635 Pinckney Rd, Howell 48843 | (517) 545-3343 |
| Michigan Tool & Gauge 1010 Packard Dr, Howell 48843 | (517) 548-4604 |
| Nbc Machining 5951 Sterling Dr, Howell 48843 | (517) 546-8445 |