The TCB Total Control GO-BALLS are the golf ball-sized version of the Total Control Weighted Batting Balls. These training balls weigh about 4 ounces each and are ideal for golf training as well as fastpitch/baseball training. Just like the regular TCB balls, the GO-BALLS 'squish' and change shape when you hit them, providing instant feedback. These balls are great for developing power, and they are a great training aid for limited spaces like the backyard. No net required!