magnetic bit holder 1/4" hex, sds plus, 3/8" hex; carbon steel, stainless steel, Alloy Aluminum; Magnetic Bit Holder Material: carbon steel, stainless steel, Alloy Aluminum Size: 1/4" Hex Length: 60mm, 75mm, 100mm Shank: 1/4" hex, 3/8" hex, sds plus Packing: blister with color card for each piece; magnetic bit holder for screwdriver