Silicone Antislip Rubber Analog Stick Grips(4 Pairs 8 Pcs) for Playstation PS4 Controller (Mix) 10 pairs 20 pack Joystick Thumb Grip for PS4, Xbox, Xbox 360 Controller. Silicone material to improve grip, performance and comfort. Prevent your fingers from slipping and provide more accuracy and sensitivity when you play video games. Made of high quality silicone materials. Products are safe, 100% no harm to children. Easy Install: Flip the cap inside out and then flip it back down to wrap around the analog sticks.