People who play basketball in some capacity, whether recreationally or for a high school or college team, are always looking to improve their game. Maybe you’ve got a silky jumper but you’re a disaster off the dribble. Or maybe you’ve got handles like Kyrie Irving but shoot like Dwight Howard at the free throw line.

That’s where Guarantee 3 comes in. It’s essentially a resistance training device for basketball players. The contraption can feel strange at first, but once you get comfortable with it—and get over the kid gawking at you from behind the fence—its benefits become readily apparent. Using “stretch bands” that you attach to your  waist or shoulder, the Guarantee 3 helps strengthen your jumper and perfect your form, improve your dribbling ability, and develop crucial muscle memory, so when you’re out on the court without it, you won’t miss a beat.

True, the Guarantee 3 takes some getting used to, especially if you’re not used to resistance work. But if you stick with it, you will reap the benefits. Whether you want to strengthen your arms to improve your long range shooting, perfect your dribble with both hands to elude defenders, or just get a serious workout, the Guarantee 3 does it all. You can pick one up at guarantee3.com.