Split shots are very useful in weighing your line with small increments and avoiding any potentially line-weakening knots. Current, depth and wind are factors that will change the weight needed to keep your lure on the bottom and these split shots can do the trick.
SIZE 0- .5GM QTY 30
SIZE 1- 1GM QTY 20
SIZE 2- 2GM QTY 15
SIZE 3- 4GM QTY 11