Features 1、1/4in Hex Shank: Includes 3PCS 1/4in hex shank keychain extension with metal hanging clasp, compatible with most 1/4in quick hex handles and 1/4in hex sockets as well as a variety of power screwdrivers, hand screwdrivers and drills. 2、Metal Material: The drill extension holder is made of stainless steel and aluminum alloy for maximum durability and extended service life. 3、Safe to Use: This tool can be carried around to avoid accidental dropping of the hex handle, helping to ensure the safety of working at height. 4、Surface Treatment: This mountaineering buckle sleeve has a chrome plated surface for rust, corrosion and oxidation resistance. 5、Wide Application: This tool is suitable for transferring all kinds of drill bits, screwdrivers, etc. which can also be used as a keychain. Specification Item Type: Hex Shank Screwdriver Bit Holder Material: Aluminum alloy, stainless steel Inner Bore Diameter: 1/4in (6.35mm) Socket Extension Length: Approx. 4mm / 0.16in Socket Extension Outside Diameter: Approx. 2mm / 0.08in Key Ring Diameter: Approx. 25mm / 0.98in Package List 1 x Hex Shank Screwdriver Bit Holder(Carabiner+3pcs Socket)