Looking for a "Roller" to Knurl some ML Bullets?

[KnightExtreme]

Was looking for a way (easy) to Knurl ML Bullets and found someone using this Roller (see attached)
Wondering where 1 might find something like this, it looked easy to use and maybe getting more consitency?
Anyone know where to find such a roller?
Thanks
KE

 

[E.Shell]

Looks like a knurling tool intended for use with a lathe. You should be able to find one at a machinery supply like Grainger, McMaster/Carr or MSC.

ETA:
https://www.mscdirect.com/browse/tn?searchterm=knurling tools&tg=Suggested Keywords&rd=k