What is this?

[Crazyflint]

anyone tell me what this is and use? Any help would be great, 

[AEBL]

The thing on the left is a swivel knife sharpening jig. The thing in the center, .

[mb5]

What material is it?  It looks like it may have been what they used as a strop. Tandy has a white jeweler's rouge that looks similar when applied and used.

[Handstitched]

The tool in the centre looks a bit like a rivet setter as I can see a notch in the middle ? 

HS

[BlackDragon]

Thats a snap rivet setter

It works like this but I'm not using the correct snap in the pic.

[bruce johnson]

That tool is for setting "bar snaps". Bar snaps are used on the edge of wide flaps like on the coin pocket in a wallet. It was a wide piece of brass with the snap stead molded in. This tool was used to crimp the bar on the edge of the flap.

[Handstitched]

Bingo !   we all learn something new every day .

HS 

[BlackDragon]

53 minutes ago, bruce johnson said:

That tool is for setting "bar snaps". Bar snaps are used on the edge of wide flaps like on the coin pocket in a wallet. It was a wide piece of brass with the snap stead molded in. This tool was used to crimp the bar on the edge of the flap.

So it works on something like this?

https://springfieldleather.com/products/brass-bar-snap-10pk?utm_source=chatgpt.com

Can you explain a little how it works?

[Northmount]

The stud in the bar is an integral part of the bar.  It just crimps the bar onto the leather flap.