1. Zinc alloy construction: These cross key wrenches are made of quality zinc alloy material, offering explosionproof and corrosion resistance, ensuring longlasting durability and reliability even in harsh environments. Ideal for professionals and DIY enthusiasts alike. 2. Versatile multifunctional tool: Designed as an allinone solution, this set includes 10 multifunction keys, each featuring a slotted and a Phillips screwdriver, making it for various emergency situations and routine maintenance tasks. Its compact size allows for easy storage and transportation. 3. Precise fit for multiple applications: Equipped with 4 key holes in triangle, square, and circle shapes, these wrenches are compatible with a wide range of fasteners, making them suitable for use in trains, cars, elevators, subways, electrical control cabinets, and more. 4. Standard specifications for efficiency: With precise dimensions, including a cross wrench length of 7 cm, socket diameters ranging from 0.31 to 0.51 inches, and slotted and Phillips screwdriver lengths of 4 cm, these wrenches are engineered for maximum efficiency and ease of use.