About this 3D model

This spinner uses (9) 7/32" (5.6mm) ball bearings and one 608 bearing. This spinner is only about 3" in diameter overall. The ball bearings require a little push, but you will feel them snap into a small slot within the ring. There's a 2nd model that uses (9) 1/2" (12.6mm) ball bearings and one 608 bearing. The spinner that uses 1/2" ball bearings is about 3 1/4" in diameter.