FUNCTION: --- Drill bit fixing/quick change, the pull-out bushing drill bit holder can replace the big box that usually holds the drill bit for easy removal and putting back on the quick connector. It prevents accidental dropping of tools and facilitates working at height. APPLICATIONS: --- Universal 1/4-inch quick hex shank and 1/4-inch hex socket make different commonly used 1/4 batch bits convenient. Fits most power drivers, handheld drivers and drills such as t25 and t20 drills. Enter your model number to ensure fit. HEAVY LOADS: --- The drill holder's strong ball locking clips can carry drill tools weighing up to 500 grams. Keeps bits from falling out. Keychain Position Holder: --- The 6-piece extension bar comes with a keychain clasp that can be easily mounted on a chain link. Compact and portable, easy to carry. DURABLE: --- The drill socket adapter is made of aluminum alloy, durable, lightweight and strong to ensure its service life. MORE EFFICIENT: --- Due to the smooth surface finish and pull-out bushing, it can avoid accidental dropping of tools and facilitate overhead work. It can be fitted with short or long drill bits. EASY TO USE: --- The keychain features a flat, thick and rounded design, which makes it easier to hold the extension pole and change bits with one hand.