Review on Red PS4 FPS Games Accessories Kit - Enhanced Analog Stick Thumb Grips with Trigger Extensions for Playstation 4 / Slim/Pro Controller by Jill Berg

If you really don't want to go to the Revain returns center to return two sets of these (the original order and the order to replace the defective pair), don't buy them. The Tiger Extensions barely snap and then fall off immediately. Not even remotely snug, certainly not strong enough for a gamer to use reliably. Such a waste of time, literally 1/4 of the trigger went off.