Miniblaster-3 Broadheads: 75 grains, 1 3/4" cutting diameter, with three 0.027" thick blades. The Miniblaster-3 is a small bundle of dynamite, packing a huge cutting diameter in a lightweight head. It is designed for extreme field point accuracy at high velocity, where the blades literally snap open on contact. It is recommended for launch speeds of 280 ft/sec or greater, at which speed the blades will leave a full-width entry wound on fur of the same thickness as that of a whitetail deer.