SIZE12* Screwdriver Bit: PH/Phillips( 0, 1, 2, 3), Hex(3, 4), Slotted(3, 4, 6)Torx(T15, T20), AD, with 4.5 inch (110mm) mini ratchet screwdriver. to solve) COMPACT PORTABLE With a compact 4" length and 1" depth, this set can be used in even the tightest of spaces. MECHANISM DELICATEThis right angle combination screwdriver set is powered by a reversible 36-tooth chrome vanadium steel ratcheting system to ensure smooth ratcheting in both directions and allow for precision adjustment. You can adjust the direction by simply dialing the rotation button during use; the small close pocket size has a magnetic clip inside the hex bit holder to keep it inserted. MAGNETIC BIT ADAPTER The magnetic bit adapter ensures that any hex bit 1 /4" can be firmly fixed for higher torque. WIDE RANGE OF APPLICATIONSThis mini ratchet screwdriver includes most commonly used bits, almost covers required screw sizes for most appliances, automobiles, homes, machinery and other equipment.And always wear protective eyewear when working to reduce the risk of injury, keep away from children.