Premium materialsScrewdriver bar made of chromium vanadium steel, stronger and tougher than most carbon steel:it is chromium plating treated for corrosion resisted and nice appearance.79-piece magnetic screwdriver set consists of Destornillador magnético de precisión de 16 piezasDestornillador con varilla de conexión de 1 piezaVarilla de conexión de 1 piezaHerramienta desmagnetizadora de 1 pieza50 puntas de destornillador (incluidas Phillips, ranuradas, Torx, hexagonales y de punta plana)10 herramientas de dadosMagnetizer demagnetizer tool,Converts any tool blade to a magnetic retriever of screws, nuts and metallic particles. We have flexible socket extensions bar and Magnetic bit holder for the screwdriver bits that allow you to use them in complex situations.Equipped with a dedicated storage box for easy carrying. Meet your work needs, Suitable for all kinds of projects,electronics, computers, watch repair, jewelry repair, and fixing anything with micro screws.