Ummit&reg; 31 in 1 Multifunction Precision Magnetic Screwdriver Set Portable Repair Tools Screwdriver Bits Kit for Apple MacBook Pro/ Computers/ Laptop/ Watches/ Mobile Phones With 31 common bits, made of High Hardness Materials, ideal for many precision repairing Compact, light weight, and portable, easy to install/uninstall various devices Embedded magnetic for quick tip attachment, with Non-slip handle for convenient using Applications: Apple MacBook Pro, PC Notebook, Tablet, Mobile Phone, Watches, Eyeglasses, and etc. High hardness and good toughness