This 4-blade design was developed for ultimate penetration and performance, even in the most extreme conditions. Super-strong blades that can be sharpened, that have been used with great success by serious bowhunters all over the world. .040" primary blade. .028" secondary bleeder blade. 1-1/8" cutting diameter. Can also be used as a 2-blade head by removing the bleeder blade. Package of 3.