Discover the SPAX Advantage. This German engineered/American Made SPAX #10 x 2-1/2 T-Star plus yellow zinc screw offers a premium quality fastening solution to help ensure professional results in less time. This high performance wood screw is not your average screw. While it is designed for wood applications it is also functional for other materials like masonry, drywall, plastic, and up to 24 galvanized steel. Masonry and Concrete do require pre-drilling. It is made with carbon steel and coated for durability to fasten strongly and securely. Do it Once, Do it Right with SPAX.