Remove the old butt cap from the tennis racquet. Butt caps are held in place with two staples, one on either side of the cap. Slide a slotted screwdriver underneath the staples and pry them out.
Pull the butt cap straight out of the handle.
Choose a new butt cap for your racquet. Many butt caps are designed to offer extra shock absorption. Choose a cap that best fits your playing style.
Install a new grip on the tennis racquet if necessary. Complete this process before installing the new butt cap.
Insert the new butt cap in the end of the tennis racquet. Press it firmly into the handle as far as it will go.
Secure the butt cap in place with staples and a staple gun.