i will agree with Rocky77340 that Rage broadheads are a one shot deal they did not design them to be easy to raplace blades you are better of just buying new ones for the price of replacement blades and the headache of changing them it not worth it . i will say the do leave a big hole . but i believe that a fixed blade is better if you smack bone i liked my muzzy 3 and 4 blades and thunderheads.