Megapro 151SS-PDM-S Display 15-in-1 Stainless Steel Driver, Yellow/Blue, 6-Piece Patented pullout bit cartridge makes it easy to find, change and store bits Handle is made from engineered nylon/ABS resin, Triax 1120 Shaft opening serves as a 1/4-inch hex driver Alloy steel shaft Palm saver cap keeps you from getting blisters on your hand