'ACME' is actually a term that refers to a certain thread kind. All ACME screws also are lead screws but not all lead screws are ACME screws. The ACME thread standard is accompanied by certain classes for instance 2G, 3G, 2C etcetera. Driven screwdrivers: This screwdriver draws its supply from https://zanekmnnl.thelateblog.com/29876112/top-guidelines-of-lead-screw-examples