Atlantic Pyramid, 3-Sided surf Caster (5 lb Bulk) These are the best surf sinker ever made! The "cupped" top will dig in and lock your bait on the bottom. Atlantic Lead Co. is the only Co. in the entire USA that has these!!! A 4 oz. will hold like a standard 6 oz Pyramid, a 6 oz like an 8 oz, etc. Free and immediate shipping!