Muzzy 4 Blade 90 grain Broadheads 6 Pack. Muzzy broadheads were designed to penetrate bone... heavy bone. Too many broadheads will fail when the going gets tough. That's why serious hunters agree, Muzzy broadheads are Bad to the Bone! Made of 416SS and hardened to 42RC, a Muzzy Trocar Tip gives you cut on impact and bone splitting performance all in one. The hollow-ground design is responsible for its exceptional penetrating ability. Through flesh and bone, it pushes material outward resulting in less friction on the arrow shaft and creating enormous entry and exit wounds.Features: 90 Grain. 4-blade head. 1 cutting circle. Screw-in for threaded inserts. Specifications: 90 Grains. 4 Blades. 1 Inch Cut. Contents:1-6. Pack of Muzzy 4-Blade Screw In Broadheads.