Originally posted by Mike Orton: I've been using them for years now, 3 inches of 2016 footed onto the Easton Axis 400 shaft, glued with JB Weld, with a 100 grain brass insert and a Grizzly Grande 190 two blade on top of a 125 grain steel insert. With a 70# ACS-CX longbow they will blow through both sides of a hollow cement block with no damage to the shaft. Awesome combination.