This assorted ball sinker pack contains 24x size 1, 10x size 2, 8x size 3, 4x size 4, 4x size 3. Ball sinkers are popular for running sinker rigs, where the main line is threaded through the sinker and left unattached, so it can move more freely. They are often positioned either running directly to the hook, or restricted to running along the main line above a swivel connection.