Picked up a rusty, frozen driver today. Just wanted to see what was inside, figured it was worth a quarter.
Reversible design. Has a single pawl with two teeth that "rocks" back and forth to engage and slip like an old clock movement. I'll call it a flip toggle pawl. Seems like most of the reversible mini-ratchets utilize the same mechanism. (YANKEE, General Tool, etc.
By not using rivets this is easy to take apart, clean, lube, and re-bolt together.
Works as good as new!