Stopped the vibration on my racquet just not wowed.

I have used many styles of dampeners throughout the years and this style works the best for me. If you place the dampener horizontally (with the widest part going left and right) it will be very difficult to pop this off your stringbed. Enjoy.

stays in nicely but very harsh

Fits well, doesn't move around, a direct hit might cause it to fly off but unlikely

They will not fly off of your racquet in the middle of the match. They fit well, they work, and they stay in place!

These are a bit larger than most dampeners, and when the strings are new and strung tightly they can be difficult to get into the strings (I usually string mine at 58-60 lbs which is top of the range). However, the great thing is they will not go flying off of your racquet in the middle of the match. They fit well, they work, and they stay in place!