Help me identify these keys.

[76masseyman]

Found a key ring with these three on it. Obviously the top one is easy, but no idea on what the middle on could be for. No number or identifying marks on it either.
The bottom thing is some sort of gauge maybe ? It has an 8 on it, and the gap is 8mm wide.
Any ideas please.

 

[H200GT]

Middle one is a CAT battery isolation key

 

[76masseyman]

Middle one is a CAT battery isolation key

Thank you.

 

[Lincs Lass]

Is the 8 a tiny spanner

 

[Pennine Ploughing]

Bottom one is for a woman's chastity belt

 

[Dry Rot]

Is the 8 a tiny spanner

Looks like a spanner for a push button or key way in a panel, like female part of a tractor starter key way? Are the 'jaws' 8mm apart, by any chance?

 

[carbonfibre farmer]

It probably isn't. But the bottom one similar to the air tool spanners at work. For changing the ends.

 

[Mc115reed]

Top one is a Lucas key

 

[Lofty1984]

Bottom ones a small wire twister

 

[76masseyman]

Looks like a spanner for a push button or key way in a panel, like female part of a tractor starter key way? Are the 'jaws' 8mm apart, by any chance?

Yes, 8mm across.

 

[76masseyman]

Is the 8 a tiny spanner

I was wondering that.

 

[Lincs Lass]

I was wondering that.

8mm is a CAV diesel blead screw size

 

[Tractortech]

Now Then..
The bottom one looks the same as Bosch used to supply with their early electrically amplified aerials. I'm sure I still have one somewhere. Has it a logo on the other side??

 

[agrimax]

8mm is a CAV diesel blead screw size

Nah.... metric vice grips for that...

 

[nick...]

Looks like a spoke tensioner to me
nick...

 

[76masseyman]

Now Then..
The bottom one looks the same as Bosch used to supply with their early electrically amplified aerials. I'm sure I still have one somewhere. Has it a logo on the other side??

No logo or anything on it, just the 8.

 

[Lincs Lass]

Nah.... metric vice grips for that...

Rough as ....

 

[Exfarmer]

The second could be MF500 ignition key but after a bit of bashing

 

[Farmer dyke]

Top one is a Lucas key

makes more sense than sɐɔnl key