[Function-bits hold/quick change]Bit holder can extend all kinds of screwdriver bits, screwdriver conversion uses. Facilitate and selection of drill bits. [ Design]Drill bits are also easy to remove and place back on the quick connect. The drill bit socket adapters are made of aluminum alloy, compact and portable, easy to carry around. [Way of Working]Hex bits that are normally used with impact drivers that have that hex quick release switch. The magnetic bit holder has a bearing detent to hold the bits, can avoid hex shank keychain extension bars from falling. [Extensive Application] Keep different commonly used 1/4 bits handy, like for drill bits, drivers, , , t25, and t20 bits. Instead of carting around large boxes that bits commonly come in. Fit most electric drivers, hand-held drivers, and bits. [Keychain Bit Holder]You receive 12 pieces of 1/4 inch hex shank extension bars and 2 pieces of the hanging buckle., Weight: 0.36596735492 pounds, Manufacturer: RANJOVER