This is an Industry standard Model Adult Wood Baseball Bat. The Birch Bats 110 has a standard knob, 1" handle, and a 2 1/2" barrel. This is the most popular bat in the minor leagues. This model is great for contact hitters as well as power hitters because of the balance and the large hitting surface. This is one of the better bats for hitters switching from aluminum bats. We gear all our models to -3 unless asked for a heavier model.