12-IN-1 BIT SET: 6PC double-ended bits in storage slots on bottom for convenient access and carry.Come with Phillips / SQUARE / Slotted /TORX four kinds of screw shafts: PH1, PH2, PH3, SQ 4, SQ 5, SQ 6, SL 3/16, SL 1/4, T10, T15, T20, T25, meet your needs of multi-purposeMINI SIZE FOR EDC: Overall Length - 3.35 inch; Bottom Diameter - 1.5 inch. It’s small enough to fit in kitchen drawers, glove boxes, tool pouches or mini boxes, even fits in your pocket for every day carryPATENTED MECHANISM: Quick-load & Auto-locking mechanism provides one-handed bit loading lockERGonOMIC HANDLE: Grooved handle fits easily in your grip, slip-resistance grip for comfortable holding and higher torque outputAPPLICATION OCCASION: The perfect mini screwdriver for all jobs in small spaces,tight areas or confined spaces. Multi-bit screwdriver set is great for craftsman, journeyman and homeowners for DIY projects