OMG Surprise Hex Nut Fidget Spinner (Customizer)

OMG Surprise Hex Nut Fidget Spinner
Customize

number of faces
type of weight: hex nut: 5/16" or M8 or loose ball bearing: 3/8", 1/2", 5/8"
edge roundness (radius)

update 2017-10-05
allow for ISO 4032 M10 (16mm) and M12 (18mm) hex nuts along with the old DIN 934 M10 (17mm) and M12 (19mm).
Update 2017-04-11
added the option to use loose ball bearings: 3/8", 1/2", and 5/8" (tested with 5/8"); for a heavy, long spinning spinner
Notes

compact (fits in small hand)
easy to install har