- You easily connect the S1 contra-angle handpiece directly to your dental unit. No need of an external motor and there are no batteries to be charged. - The S1 contra-angle handpiece has an integrated gearbox which creates reciprocating motion directly in the contra-angle. - This means the instrument rotates alternately with a larger angle in clockwise direction and a smaller angle in anti-clockwise direction. - With the accompanying apex clip you can easy connect the S1 contra-angle handpiece to an apex locator. contents - 1x S1-E Contra-Angle Handpiece, 1x S1 Apex Clip dia.2.0mm, 1x S1 Plus Treatment Pack *Note that extra delivery fees may be applied to this item. For more info contact Toothpick Customer Support or check out Terms and Conditions policy.