unknown snail hitchhiker - please help!

[r1v2c]

Can anyone please identify this snail??
I just bought a frog spawn coral and by the time I came home this snail was crawling around the bag (there was also a mini bristle star about an inch long). Before I add it to my aquarium I wanna double check if it's reef safe / beneficial to my tank. Can I consider it as part of my CUC?
By the way ... the pics came out huge but it's only about 1/2 and inch long.
Thanks !!

 

[cranberry]

Columbellid snail... good guy.

 

[r1v2c]

thanks for your quick reply cranberry !!

 

[bang guy]

Euplica sp. (yes, a Columbellid) These snails are commonly referred to as Strombus maculatus but they are actually not a Strombus species.