Features: Made of high quality nickle plated iron, these screws and nuts are sturdy and durable. These cage screws and nuts are installed in square or rectangle holes. Fast and convenient to install, they can be disassembled and repositioned. They are the best choice to replace welding nuts. Preferred fasteners for electrical cabinets of railway, vehicles, network cabinets, mechanical mold, etc. Specification: Material: Nickle plated iron Size: M5*16, M5*20, M6*16, M6*20 (Optional) Quantity: 20pcs Weight: 160g~208g / 5.6oz~7.3oz (approx.) Package list: 20 * Screws and Nuts Package List 1Made of high quality nickle plated iron, these screws and nuts are sturdy and durable. 2These cage screws and nuts are installed in square or rectangle holes. 3Fast and convenient to install, they can be disassembled and repositioned. 4They are the best choice to replace welding nuts. 5Preferred fasteners for electrical cabinets of railway, vehicles, network cabinets, mechanical mold, etc.