The Megapro 151TP 15-in-1 Multi-Bit Tamperproof Screwdriver features the most popular secure-access bit types. Convenience is designed into each Megapro screwdriver handle, with a patented pullout bit cartridge that makes it easy to find, change and store bits. The shaft is made of durable alloy steel. It offers a 1/4" hex driver. The handle is made from engineered nylon Triax resin and has a palm saver cap to protect hands from blisters.