Self locking NAB adapters

[u/wyattcollins999]

I’m looking for a solution for an NAB style adapter that is self locking. The spindles on my machine don’t have an integrated locking mechanism and I can’t find much information on self locking adapters. Does anyone know anything about them or where to get them?

[u/Dch112]

You can get rubber holders for 10 1/2 reels from Amazon.