Our VPA Turkey Spur broadheads are designed for maximum energy transfer and quick kills on tough birds. The rear positioned “Spur” blades are sharpened at the outer most edge only giving a 1 1/8” cutting diameter. The forward facing edges are left un-sharpened. The un-sharpened facing edges, along with the space between forward and rear blades, aid in the rapid deceleration necessary for maximum energy transfer.