Thomas Headstrom 25m Size 15  

Thomas Endodontic Instruments are unique because they have a ‘fail safe’ screw-fit stopper mechanism that is secure, adjustable and won`t move when in use. The stopper is adjustable with a screw fixing. Each turn is 1mm, so placing the stopper exactly in the right place is quick and easy and won`t move like rubber stoppers providing peace of mind when working on the root canal.