[Function-bits hold/change] The bit holder can extend all kinds of screwdriver bits, screwdriver head conversion uses. Make it easier to collect and select drill bits. [Wide Application] Keep various commonly used 1/4 bits at hand, such as for drill bits, drivers, bits, , t25 and t20. Instead of carrying large boxes, the bits usually come in. Fits most electric drivers, handheld drivers and bits. [Working Mode] Hex bits that are normally used with impact drivers that hex release switch. The magnetic bit holder has a ball bearing to hold the bits, can avoid the hex shank keychain extension bars from falling off. [unique] The drill bits are also easy to remove and put back on the connection. The drill bit socket adapters are made of aluminum alloy, compact and portable, easy to carry. [Keychain] You will receive 24 pieces 1/4 inch hex shank extension bars and 4 pieces of the hanging loop. Material: Aluminum alloy Color: Multicolor Package Contents: 24 x Keychain Screwdriver Bit Holder