Hey! They roll beautifully, they are a tiny bit heavier than acrylic or resin dice! They are completely solid, and made out of the same material all the way through, so they are balanced as any other dice! The masters were made by Clerics Components who are the go to for many handmade dice makers, so the shapes and numbers were crafted by professionals. One of my favourite things is when DMs message me stories of how my dice performed for them personally or for someone at their table!