To use Chinese iron balls (Baoding balls), rotate them in your palm to trace a circular path. Start by rolling them clockwise in your right hand and counter-clockwise in your left. Once comfortable, practice reversing the direction to engage different muscle groups.For optimal results, follow these practices:The Motion: Push the balls using your fingers so they roll smoothly around each other without touching.Reversing: Changing the spin helps build balanced dexterity and forearm strength in both directions.Advanced technique: Try separating the two balls so they orbit independently in the palm without making any noise.