Blade will not release on sawsall - Garden

Ok first this is in the chainsaw category and since they don't make one,, I'll assume you mean a sawzall, if you have the quick release ( which is a joke and is a bad part ) your going to have to breal off the blade at the section that it reduces ( where it goes into the holder) unscrew the ringnut that releases the blade, and take it all apart. be careful there is a ballbearing sitting inside there that will roll right out and naturally get lost in the mix. once apart you can remove the last of the blade. Now if your really lucky, you can clean it,, lightly oil this piece , and reassemble it,, and it will work, I have 3 and have replaced that part on all 3 of them,, Now if its an older model that still has the set screw hold down,, Just unscrew the setscrews and remove the blade, ( some have 2 some just one set screw depending on the model