Krumrie was well-known for his incredible hand strength, which should be an essential part of training programs for the game of football. Krumrie’s specific grip routine can be found in The New Bodybuilding for Old-School Results by Ellington Darden.
Use this machine strictly with no monkey business and you’ll go up a few collar sizes in no time. I recently got one from a local high school who said they were getting rid of it because “they didn’t need it any more” ~ oh brother.
Use one if you can find it, or get one for your home gym, but only if you happen to have a lot of room — this one’s over 10 feet tall!