General description Package includes 12 pieces of 1/4 inch hex shank handle keychain extension rods with a black metal hanging buckle. These are compatible with most 1/4 fast hex handles, 1/4 hex sockets, electric screwdrivers, hand-held screwdrivers, and drill bits. The keychain extension rod is compact and easy to carry, making it suitable for transferring drill bits and screwdrivers, and it can also be used as a keychain. Technical specifications Drive System: Hex Color: Photo Color Material: Metal Size: 10.49 x 7.19 x 2.79 cm Package Contents: 12 * Holder Extension Bar Measurement allowed error: +/- 1-3 cm Other information The drill bit extension bracket is made of high-quality metal for maximum durability, featuring chrome plating that is anti-rust, corrosion-resistant, and anti-oxidation. It can be carried with you to avoid accidental dropping of the hexagonal handle. It is easier to pick up the product and replace the drill bit you need with one hand, enhancing safety during