KontrolFreek Aim Boost kits are the ultimate combo to upgrade your aiming with Performance Thumbsticks® and increase your accuracy with Precision Rings™.  Improve your aiming and targeting speed, even at the highest sensitivity settings. Includes everything you need to improve your aim and accuracy Mid-rise thumbstick improves in-game movement on left analog   High-rise thumbstick increases accuracy and precision on right analog  Precision Rings add resistance for increased accuracy at higher sensitivity settings New improved proprietary rubber material for extra grip and comfort  Made in the USA by the industry leading controller enhancement brand