I would contact the company.I have had my block for two years and have shot at it 1000's of times with no pass throughs.However, do you really think that the foam will stand up shooting razor blades at it?I shoot the Muzzy practice blades and if I stick with shooting at one spot they will chew the foam up quite fast.I don't think that there is anything that is going to handle broadheads being shot to the same spot for very long.Ron