Two thugs targeting West Side women commuters have pulled off four robberies — snatching digital devices right out of their victims’ hands as a subway stopped at a station, cops said last night.

The crime spree began Oct 24, when the pair ambushed a 22-year-old woman on the uptown B platform at Seventh Avenue and West 53rd Street, stole her cell and fled.

The thieves’ three subsequent hits — on Oct. 26 and last Monday and Tuesday — were E train riders who had their cell phones and an iPad Touch snatched while their trains stopped at the Seventh Avenue station, police said.