Chain adjustment guage??

[Roge]

I've seen a gizmo that can be used to set chain tension on a bike but can't remember what it is called or who makes it. basically it sits on the ground with the chain set on top of it with a read out of the chain play in " or mm any clues

 

[imobu]

This sort of thing?
http://www.utahsba.com/html/maintenance/2001_9.html

 

[Roge]

Thanks

 

[45grum]

wos a chain???????

 

[LOLGEOFF]

wos a chain???????

22 yards

 

[GSmonkey]

22 yards

or 4 rods