Description: Material:Expanded aluminum nails are made of aluminum, which is sturdy and easy to use. This ensures that they can withstand the worst conditions.Easy to Use: These all aluminum knock in core expansion rivets are designed with a round head and are easy to install by simply knocking them in place, making them ideal even for beginners.Versatile Application: Whether you're working on home improvement projects or professional construction jobs, these blooming rivets provide reliable fastening solutions that can be used in various materials including metal, pp or wood.Design: By adopting a unique expansion design, it can be easily penetrated into concrete, wood, and other materials. The aluminum structure ensures durability and strength, making it an ideal choice for various projects.Feature: Tapping Expansion Screws Very suitable for installing wall cabinets, safe window, and wall panels. It is easy to enter narrow space and set up in difficult areas. Specification: Material:aluminum Size Chart: 0.5cmx0.7cm/0.20inchx0.28inch0.5cmx0.9cm/0.20inchx0.35inch0.5cmx1.1cm/0.20inchx0.43inch Package Includes: 50Tapping Expansion Screws Note: Please allow slightly errors 1-2cm differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin