Is there a standard size set screw used to hold the handles on kitchen faucets ??

I have a Delta and a Premier kitchen faucet and there is a small set screw that holds the handles on. Looks like an Allen key / wrench. Does anyone know what size these are ??

They are standard. I don't know the size but,if you take on out ALWAYS put a new one back in. You should be able to buy an inexpensive set of keys( Wrenches) for them....metric and standard

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