Our Precision Rings are made from a unique material that adds resistance to your stock thumbsticks so you can take more accurate shots, even at max in-game sensitivities. They are highly elastic, so you can use them again and again. Precision Rings include four (4) universal rings that allow you to choose your resistance level. The two (2) purple medium strength rings have a durometer of 10a and the two (2) black hard strength rings have a durometer of 15a. If you love our Performance Thumbsticks, Precision Rings are fully compatible. Try combining them with your favorite Performance Thumbsticks to max out your sensitivity and take your game up an extra notch.