The on impact of the XMAG-CP crossbow magnum head has a hardened steel chisel point cuts a 2 bladed 2â entry hole that the impact blades cut a clear path for the internal cutting blades that open inside the chest cavity to create a massive 4 blade wound channel to achieve max penetration with total cutting of 3.75â. The 7075-T6 aluminum is twice as strong with the two blade entry hole, four blade exit, durable .036â 420 SS mechanical blades, straightness guaranteed, military grade containment strap, field point accurate, can convert to 125 grain broadhead (collar not included).