WARNING: CHOKING HAZARD - Not suitable for children under 36 months. Choking hazard (small parts).
The Doctor's multipurpose tool is a Gallifreyan device, with numerous settings, easily controlled at the press of his thumb. The Doctor has had many sonic screwdrivers of different designs throughout his life. This is the Eight Doctors Sonic Screwdriver.
Doctor Who Electronic Sonic Screwdriver: 8th Doctor - B00HVD52JS