I like the tether on that tool better than my orange and blue ones. I replaced a head gasket on my 620 last week and got the cord of the tool stock under the cylinder head. I didn’t realize it until I tried to remove the tool and reinstall cam sprocket.

This is also a good timing chain tool, too bad it is not available for L series engines. These tensioners are from the later KA engines.

 

That one prevents the tensioner  from opening too far, the ones in my pics hold the tensioner fully closed so you don't have to fight against it while installing the cam gear.

Cool. I missed the dual function. Thanks!