Very interesting to find this sabre cut handle under that name! I know it from a German sawblade manufacturer named Wilpu - which makes great blades.

I have the tools handle two intact and the big curved pruning blade. Mine has never come out of either handle. It's awesome! You might have a faulty handle.

That sabercut handle is sold under norskie brand in the US here a bit manufacturer. If you really want a gnarly pruning blade the skil brand here in thr us has a blade called "the ugly" you could chop a tree down with one.... they last a good long time if you don't heat the hss too hot running it. The teeth are hard-core blue titanium looking heat treat. Good stuff I'll keep an eye on this channel