Carbons by virtue of being harder to destroy than aluminums. I sent an aluminum out of the Pat and hit the target bag a little crooked. The thing looked like a pretzel. I hit a sapling at a 3-D shoot (used the wrong pin!) with a Gold Tip sending it ricocheting off with no damage whatsoever. If you use the right glue for the inserts and unibushings you'll be able to safely remove them from the shaft if they're damaged, further extending the shaft's life. I nearly robin-hooded one of my carbons and was able to heat the unibushing, remove, and replace it without damage to the arrow.

Fritz