Other similar devices snap in very securely. If it's not very tight, even a small bump can unlock it! Because the handle is heavy, that weight alone pushes it out. The instructions say to secure the handle by wrapping the chain around it after tightening. It seems to me that you can sand the handle a little to make it tighter, but be careful. I keep it because it's inexpensive and I need to manage the static load.
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