About this item Made of premium materials Chromium molybdenum vanadium steel, its corrosion-resistant After chrome plating. Strong 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. Magnetizer demagnetizer tool,Converts any tool blade to a magnetic retriever of screws, nuts and metallic particles. 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.