Fangrui Product Details Fangrui Product Details [scope Of Application]universal 1/4 Inch (about 0.6 Cm) Quick Hex Shank And 1/4 Inch (about 0.6 Cm) Hex Socket, Convenient For Placing Different Commonly Used 1/4 Inch (about 0.6 Cm) Drill Bits. Fits Most Electric Drivers, Hand Drivers And Drills Such As T25 And T20 Drills Etc. []the Drill Socket Adapter Is Made Of Metal, Which Is , And Strong, Which Guarantees Its Service Life. [how It Works]this Bit Holder Keychain Has A Ball Bearing To Hold The Bits, And They Work Like A Slide Or Snap Lock. This Allows You To Easily Change The Drill Bit With One Hand. [large Capacity]the Lock Of The Drill Holder Can Carry Drill Tools Weighing Up To 500 Grams. The Drill Bit Is Not Easy To Drop. 1/4inch Hex Shank Screwdriver Bit Holder: Set Includes 1/4 Hex Shank Keychain Extension Rods With Black Metal Hanging Buckles Compatible With Most 1/4 Speed Hex Handles And 1/4 Hex Sockets And Assortment Of Electric Screwdrivers, Hand Screwdrivers And Drill Bits. Portable Wide Application: Small Size, Easy To Carry, Can Be Use