Fishing Mold Lead Round cavity 7 - 15 Sport Ball DIY Do It

Does anyone know what this is? About the size of a musket ball, just over 1cm in diameter but with a little nubbin on top. Pretty heavy so probably led. Found in

Adygil DIY Pyramid Sinker Mould with 4 Cavities and 100g 120g 150g 200g for Saltwater Fishing, 24 pcs 24mm S/S Eyelets Includes - AliExpress

Fishing Mold Lead Round cavity 7 - 15 Sport Ball DIY Do It

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