Vktech 10 In 1 Precision Screwdriver Bit Set Torx Star Phillips Repair Tool Kit Bits can be stored in handle Great for home, office, electronics, and hobby Choose a suitable bit form the 9 different ones stored inside Sot the bit into the top end of the drive. It can beheld in position by the built-in magnet Length: 11.5cm , Diameter: 1.3cm