About this itemMade of premium materials Chromium molybdenum vanadium steel, its corrosion-resistant After chrome platingStrong magnetic tips with black finish blade attracts screws easily.The grip of this screwdriver bits set is made of PP and TPR material, provide maximum torque. all size printed make easier to pick.Include 5pcs phillips screwdrivers?5pcs slotted screwdrivers?4pcs torx screwdrivers?9pcs precision screwdrivers?40pcs bit set ,20pcs power nut driver ,1pc 40 in 1 screwdriver and1pc Magnetizedemagnetize.Come with a storage box for easy carrying. Meet your work needs and can be widely used in most projects such as household appliances, furniture assembly, automobile or factory use.Its also a great gift for DIY TOOL .