The Do-It Molds Cannon Ball Sinker model CB-3-456B is a cannonball sinker mold with 3 sinker cavities ranging from 4-6oz. Cannon Balls drop faster and straighter than other sinkers. Load your rig with these round sinkers and shoot your lure down to the depths you need. The Cannonball Sinker Mold affords you the opportunity to make your own fishing sinkers. This model has 3 cavities ranging from 4oz to 6oz.