What if the op isn't a teenager?

Yes but the problem here is that the OP now needs to prove its theirs, by way of a receipt or something that shows the goods belong to them. Not everyone keeps the receipts or engraves their valuables.

Involve his parents? Wtf?

A good working saw? Did you miss the part where he said the blade was missing and the cord was cut?

He said he has to return a good working saw. He means even if it was the same saw, but broken beyond repair, that he (the friend) should buy a new one that does work.

No one is saying he is a teen but obviously he is his peer because, he is borrowing tools an things. An him not answering door screams immature.

Haha like that one episode of Big Bang Theory

Just steal your saw back when you have the chance. I donkt let people borrow my things because I am always afraid of bad stuff happening.

And stop calling him your friend. He's an asshole, OP.

Yeah this guys right. He's not a friend. I'd knock on his door and stay low out of sight of the peep hole. Then when he opens it kick him in the balls. Throw his saw back at him and then take mine back. But that's just me.

Kick him in the balls?? A swift punch to the mouth would be more appropriate, sir.

Damage is visible. Kick to the balls hurt more and not as much of a chance to hurt yourself. Also more likely to go to the police for getting punched in the face than getting kicked in the balls

Then OP will be repairing the windshield and probably lose any chance of getting his saw back.

They'd be about even and OP could honestly claim it's not his saw :)