Model 55 is based on the classic Louisville K55 model. This was the model used by one of baseball's greatest players, Mickey Mantle. It has a thick 1" handle with a thick transition to a full 2 5/8" barrel. It has exceptional balance for the player looking for hard wood, lots of pop and good bat control. This was a very popular shape in the 1960s and 1970s and again with many big leaguers in the 21st century who like the bat control the thick handle provides and the large mass the heavy bat puts behind the ball. A classic bat shape that transcends different eras.