Playmate GrandSlamPlaymate GrandSlam The name says it all! The Playmate GrandSlam is the fastest ball machine in the world. It can throw any type of spin, including: Left handed slice Right handed slice Left handed kick Right handed kick American twist The Slam can land a 120 mph serve every time. It can randomly serve to a player up the "T", at the body or out wide. The unique four wheel design allows the Slam to grip the tennis ball like no other machine in the