How's this for tough.....

Magnus Stinger. I shot a doe through both shoulders this fall. Blew all the way through her. The ole Stinger was messed up pretty bad, so I sent it back and Magnus REPLACED IT! No questions asked. Lifetime warranty. If you hurt it, and it doesn't matter how, you can shoot a rock with it and they'll replace it.

They are VERY simple to resharpen. I killed deer with them after I shot them at targets. Simply resharpen and you're ready to go. They also fly like lazer beams!