We are a Michigan made company providing broadheads for compound bows and crossbows. They weigh from 8-15 grains and slide over the shaft of your arrow. You just have to tighten it back on with a pointed feild tip that you already use to practice with. There is no need to re-sight in your broadhead because it sits farther back on the arrow and is light weigh so it will hit the same spot as what you practiced. The broadhead is also serrated so the hide raps around the broadhead making a bigger hole than what the diameter of the broadhead actually is. Tracking is not an issue with this broadhead!