Do you recommend K&F magnetic filters?

Do you recommend K&F magnetic filters? I'm looking around for CPL and maybe ND filters for my Sigma 18-50 F2.8. I'm curious whether K&F magnetic filters (and their magnetic caps) are secure enough for me not to lose them during hiking, attached to my backpack strap with a backpack capture clip / QR system. Otherwise, maybe I'll just go for regular screw in filters. Just for extra con...

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