Is this convex bend in my furnace filter slot OK?

How To Upgrade Your HVAC Air Filter To A 5” Honeywell metal furnace filter slot cover metal duct work; Installs in FilterLock satisfies the department of energy recommendation that the furnace filter slot be covered to avoid air leaks metal slot drain Filter Lock installs in seconds without any tools The built-in magnets attach Filter Lock to metal duct work and hold it securely in place Use Filter Lock

metal slot Sheet Metal Hack- Filter Slot in Return Air Duct Tractorman44•770 Furnace Tearout Field