[Rust ]The chrome-plated of the screwdriver drill bit holder increases rust resistance. It can be used for various drives, making this extension bracket very convenient and flexible [Durability]The hard alloy bracket can achieve maximum durability of extension bar drill adapter, and -duty structure can extend the service life [Easy To Carry]Aluminum alloy screwdriver bits holder are small and portable, easy to carry. Suitable for handling drill bits, screwdrivers, and bits. [Aluminum Alloy]The drill extension frame is made of aluminum alloy and has a heavy-duty structure to maximum efficiency [Wide Application]Expansion of various screwdriver bits, screwdriver bit conversion using universal 1/4-inch hex socket is suitable for most electric screwdrivers, hand-held screwdrivers and screwdrivers, Manufacturer: Mcnhbdgg