common tools only sold by Snap-On

[mechanic10]

The 1st Snap-on tool i purchased way back in fall 1967 when i was just starting my career was a 1/4 inch drive ,9/16 universal socket.At that time only Snap-on made a 9/16.All the other tool companies stopped at 1/2.I used this tool hundreds of times over the years.Mostly for changing generators on JT3D and JT8D turbine engines.Needed that socket along with a long extension to reach to top 3 nuts.
I still remember the cost.It was about $4.65 from the truck.At that time it was more than 1 hours pay for me.
excluding the special use tools and wrenches ,what other tools can others think of that were only Snap-on ?

[snapmom]

A 5/8 deepwell, 9/32 drive.

[madprofessor]

The first Snap-on tool I bought was a 5/8" swivel extension spark plug socket FSKX620A. I was driving a Jaguar XJ-S with a V12 at the time and people on the Jaguar forum told me to go buy one from the Snap-on guy because it was the only tool that could reach all of the plugs without taking out the A/C compressor. Being used to Craftsman prices at the time, I was quite shocked when he told me the price. It ended up being worth it.

[wreckercologist]

While I did not purchase this tool, I believe the FX-1 could qualify for this list. My father bought one in 1966 to change the plugs on his brand new '66 Fairlane 390 GTA. Ford recommended unbolting the motor mounts and jacking the engine up to access the rear plugs. The old man claimed Snap-on was the only tool company at the time to make an extension in this length, thus allowing plug changes without all the fuss.

Pretty much anything flank drive, but the 5/8" shallow 1/4" drive TM20, and the TMM16 16MM stand out.

[agmechjake]

Snap on made a wrench for John Deere starters that was a double box end 9/16" Part # B4400. Makes changing the starters so much easier. I have only seen a wrench made by OTC for the same purpose but it only has one box end.