1,This ratcheting screwdriver handle for the standard size bits, and it has a smooth hi-torque durable, ratchet mechanism which allows for two rotation option: Forward & Reverse. 

2,The 1/4 iInch hex socket is perfect for all kinds of hex shank screwdriver bits, the quick-release chuck enables rapid bit change without needing any special tools.

3,1/4'' Hex High Torque Ratchet Driver Handle for Torx Security, Phillips, Hexagon, Slotted, Square Screwdriver Bits.

4,Total length is 6 inch, each edge of socket can be accurately locked screwdriver bit, strong magnetism can keep the screwdriver from falling.