【Brand New】 Screws, Bolts (Medium) 12 pieces (Small) 20 pieces [1]: Application - Expansion tube screws are suitable for a wide range of applications and are used in home decoration, construction, industry, etc. They can be installed on various types of materials. [2]: Design - The expansion tubes for drywall are made of plastic, are not easily damaged, and are durable. Self-drilling screws are made of carbon steel, and the flat head surface is zinc-plated, providing high strength and durability against harsh environments. [3]: Advantages - Fold the expansion tube in the middle, insert it into the hole, and tap it flush. Attach the screw through the fixture to the expansion tube. When the screw is tightened, the plastic tube expands, increasing the fixing force. ★ Items will be shipped in simple packaging. Thank you for your understanding. m(_ _)m