The only one that has a strap is the Stemme, because the gas strut
will lift the canopy.

Doesn't lock because it is not for a 'leave out in the weather and
protect the canopy'... Jaxida does that.

We just use them for after rigging and waiting for a tow, then toss it
into the back.

My brother uses it on his Discus and mine in my Nimbus....they work
great.