For more than a decade, Louisville Slugger's Omaha 517 has performed at a high level, in the hands of the world's top players. And the 2017 model has evolved even further. This year's bat has an improved ST 7U1+ Alloy blend that helps strengthen the metal and deliver an even more durable one-piece bat. Time and time again, it's been proven to be a top choice for power hitters and elite ballplayers at the travel and college level.