Yep, the scrollwheels are metal so they have some heft and they do keep spinning. I haven't used the MX Master, only very briefly tested a display unit at a st

Yep, the scrollwheels are metal so they have some heft and they do keep spinning. I haven't used the MX Master, only very briefly tested a display unit at a store, but I do believe that it spun for a while. So I'd check a video review first if you're thinking of buying one. I personally use their G(aming) series mice with their older manual, mechanical mechanism instead of the new electromagnetic one in the MX Master. The G mice spin for a while... 15 seconds after a solid flick.