"Do you have your head screwed on?" This is something my nasty old teacher used to say to me on a daily basis. I thought he was calling me stupid but now I know he was referring to my Oral B electric toothbrush head. It all makes sense now! Get your (toothbrush) head screwed on: four (€12), eight (€20) or 12 (€26) electric toothbrush heads compatible with Braun Oral B electric toothbrushes including delivery within ROI.