Giving 5 out of 5 because what plumbers in my area gave up in doing. It did just in matters of minutes. My bathroom fitting's wtaer filter was clogged and wasn't opening. Our plumbers failed to open it with their heavy pipe wrench. And WD-40 did it in just few minutes without getting any help from any plumber.
Does the job after spraying several times and waiting for quite sometime to take effect. If the screw or nut and bolt or for that matter door hinges it does pretty quick if they are just tight and not rusted. Overall OKAY. The price could be lower.
Good product, .works on most surfaces, such as metal. Can be used to clean other surfaces too, such as Stone and mosaic. Removes rust from metal surfaces, and loosen them from tight bonding, for example rusted nuts can be loosen quickly.
I’ve always relied on WD-40 for round the house usage. It’s a versatile product for door hinges, garage door openers, bicycle chains, squeaky parts and even sticker/label removal. It’s a basic need in any household.
Must have at home and garage. Easy to spray on many things, removes squeaks from hinges,joints,pulleys,doors,handles, almost all metal surfaces.. Smells strange like baygon or hit.. But it did work for me.