General description 6PCS 1/4 Inch Hex Shank Screwdriver Bits Holder Extension Bar Keychain Screw Adapter Drill Change includes 6 pieces of 1/4 hex shank handle keychain extension rods with a hanging buckle. These are compatible with most 1/4 fast hex handles, 1/4 hex sockets, electric screwdrivers, hand-held screwdrivers, and drill bits. Technical specifications Material: Aluminum alloy Color: Multicolor Measurement allowed error: +/- 1-3 cm Usage The keychain extension rods are portable and easy to carry, suitable for transferring drill bits, screwdrivers, and more. They can also be used as keychains. Other information The drill bit extension bracket is made of high-quality aluminum alloy for maximum durability. Chrome-plated finish provides anti-rust and corrosion resistance. Designed for safety to avoid accidental dropping of the hexagonal handle. Facilitates one-handed operation for easier drill bit replacement.