DIY Olympic Concrete Weight Plates - In-depth guide in comments : r/homegym
Make a Minimalist Round Black Concrete Tray
How to Make Olympic Concrete Weight Plates Homemade Guide : 5 Steps (with Pictures) - Instructables
Stix and Stone, Concrete Weight Plate Molds
Reusable mold for concrete, cement.
AUTUMN 25-45 LB Concrete Cement Weight Plate Mold, Mold for DIY Olympic Barbell Weights, 13 Dia
Rock Weights: DIY Concrete Dumbbell and Kettlebell Molds
buildyourownhomegym
DIY Concrete Weight Plates SAVE MONEY & DON'T BUY MOLDS
DIY Weight Plates: Make Your Own Concrete Plates
DIY Stepping Stones: Kids Footprint Keepsakes- With DIY Cement Molds! - Making Things is Awesome