The Trocar HB features 0.35 thick surgically sharp stainless steel mechanical blades that stay tucked in tight to the solid-steel ferrule in flight, but they deploy reliably with a 1-5/8 expandable cutting diameter. The fixed blades are also 0.35 thick and have a cutting diameter of 1. They have an offset for increased accuracy and stability. The total cutting diameter of the HB is 2-5/8. The Trocar HB features a bone-crushing chisel tip.