The Axe Bat has been floating around the baseball world for a few years now. If you’re not familiar, the handle of an Axe Bat is shaped like the handle of an axe.

The idea behind this handle is that it will fit the hitter’s hand better, which thus makes it more ergonomic. The axe handle is more oval-shaped than round, allowing the hitter to get a better and more comfortable grip on the bat. Additionally, the knob of a traditional round-handled baseball bat can sometimes slide into and bang up against the palm of the hitter’s hand, while the shape of the axe handle helps prevent this. Manufacturers of the Axe Bat claim that this feature also helps the barrel of the bat to progress through the strike zone unhindered, thus allowing the batter to generate more bat speed.

The creation of the axe-shaped bat handle came from Bruce Leinert, who filed a patent application for the ‘Axe Bat’ in 2007. But the original inspiration of Leinert’s invention came from a line in a book by one of the game’s greatest hitters, The Science of Hitting by Ted Williams. According to Williams, “Swinging a bat is like swinging an axe.”

Over the years, use of the Axe Bat has spread throughout college and professional baseball, and permission from Major League Baseball for in-game use of axe-shaped handle bats came starting the 2015 season. MLB players who have adopted the new bat handle have included Mookie Betts, Dustin Pedroia, George Springer, Kurt Suzuki, and Dansby Swanson.

Players who use the Axe bat speak highly of its benefits. It takes a few swings to adjust to the differently-shaped handle, but the adjustment happens quickly. According to Mookie Betts, “I was able to take it out for BP one day, and the next day, I was using it in the game. And from that point on, I’ve used it in every at-bat.” Perhaps the first player to really use the Axe Bat in MLB was Dustin Pedroia, who stated, “It feels good in your hand. And then I read up all the studies they did on injury prevention. Supposedly, the way the grip is set it increases bat speed. Just grabbing it feels comfortable. You don’t feel like you have to turn it before you swing. I like ’em.”