Review on ⚙️ iGreely 4 Piece Solar Metal Spanner Wrench Set - Connector Tool Kit for Easy Assembly and Disassembly of Solar Panel Cable PV System Wire and Connectors - Includes 2 Pairs by Jarrett Young

It's hard to give this 5 star rating in one review as there are so many different companies that make cable adapters for mc4 solar panels. They're a little more durable than my last metal set. Plastic keys break easily. Whilst km doesn't give these 5 stars they are the best in design although they have a bit of slack on some ends which prevents the tabs from being pushed in and allowing the adapter/connector ends to separate.