I am having great difficulty changing the blades on my Rocket Hammerheads. I have the replacement blads and screws but cannot get the screws out to take the old blades off. The screws that I have to replace them only have three threads on them...but in trying to get the old ones out they turn and turn and turn and turn....but won't back out of the hole.

Has anyone had similar problems and found a solution? I have 4 broadheads that have served me very, very well but are now useless because I can't change the blades.

Any solutions or ideas are appreciated.