| A and I Supply | | Major tool warehouse/distributor servicing automotive, truck, marine, industrial, and woodworking/construction industries. |
| Able Emissions | | Manufacturer of emissions test supplies, smog handles,probe handles and hose assemblies. |
| Allstates of America Inc. | | Large catalog inventory of used, new and reconditioned auto shop and engine rebuilding machinery and tools. |
| ALM Autolift | | Manufacturer of auto, van, and truck lifts. For repair shops or home use. |
| Alpha Omega | | Tools and equipment for automotive service bays. |
| American Torque Tube | | Offers power tool attachments, as well as electric and cordless impact wrenches. Site does not load on Netscape. |
| Assenmacher Specialty Tools | | Automotive diagnostic equipment, cooling system testers, stud removers and specialty tools for service and repair of European cars. |
| ATEC Trans-Tool | | National manufacturer and supplier of general automotive and specialty transmission tools, equipment, supplies, cleaning systems, diagnostic testers and more for service, repair and rebuilder shops. |
| Auterra | | Specializes in a Palm OS-based J1850 and ISO-9141 compliant OBD II scan tool that connects to an automobile computer for diagnostics purposes. |
| Auto Cosmetic | | Paintless auto body dent removal tools and training. |
| Auto World | | Online automotive tool shop carrying a wide variety of vehicle tools. |
| Auto-Force | | Independent automotive and industrial tool & equipment distributor, located in Canada. |
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