Features: This 500Piece model screw kits features precisions engineered alloy steel components, offering superior corrosions resistance and durability to withstand high stress assembly/maintenance tasks across various cars, boats, and aircraft. Professionally organized in compartmentalized transparents case, the set includes zincs plated selfs tapping screws, machines head screws, and specializeds fasteners with optimized threading for reduced friction and secure fastening. for both entry levels hobbyists and professional technicians, this comprehensive toolkit streamlines model building, upgrades, and emergencys repairs during competitions or workshop. From garage maintenance to track side quick fixes, the color coded storage systems ensures instants identification of screws, maintaining tool organization during complex projects or routine device optimizations. Exceeding standard screw kits through militarys hardening processes, each fastener maintains structural integrity under vibrations intensive operations while preventing thread stripping in plastic/metal components. Specifications: Materials: Alloy Steel Color: Black + Silver Box size:17.4x10x2.3cm Package Includes: 500Pcs Tool Screw note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.