Found another screw starter today!

[bonneyman]

Chicago Specialty Manufacturing. 5/16" hex head.

For 50 cents I couldn't leave it.

[Northwoods]

Nice.

I can see that it would come in handy for a big job.

[lptools]

Hello, Bonneyman. That is a neat tool, comes in handy for a lot of uses. I have one here marked No. 3015 Rimster Pat. No. 3178971. I always thought that this was a plumber's tool, for the bolts on a self-rimming sink, but I could not verify that.. This photo is what I had in mind.Regards, Lou

[Bill Houghton]

Neat.  A really different design.

I mainly use those starters that have a spring-loaded bit in the middle that twists against the slot to hold the screw.  I like them, but you have to be really careful not to bump the screw against anything on the way to the hole, or it'll fall off.  I've used a lot of the cuss word inventory starting screws with these over the years.