Different weights for different jobs. Lets look at a few.
When you’re free lining a shrimp, or small bait you may want to slow it down, or gently keep it close to the bottom . You will need Split Shot for this technique.
Earlier we talked about Knocker Rigs. You can use this technique fishing with shrimp, or a 5 lb. jack for shark. Depending what your using for bait, and water current will determine the size weight needed. These are Egg Sinkers.