The SPAX Factor - For the craftsman that concentrates on the details, We Work for You. For the Pro that puts qualify first, we help you create stronger connections, enhance performance and improve results when your reputation is on the line. 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-Gauge steel. Masonry and Concrete do require pre-drilling. It is made with carbon steel and coated for durability to fasten strongly and securely. US made SPAX is your trusted partner for your fastening needs. Do it Once, Do it Right with SPAX.. Drive Style: Phillips. Fastener Color: Silver. Fastener Material: Carbon Steel. Fastener Type: Specialty Fastener. Features: Self Tapping. Head Style: Flat Head. Included: Driver Bit,Screw. Interior/Exterior: Interior. Materials Fastened: Multi-Purpose. Measurement System: Inches. Package Quantity: 57. Product Weight (lb.): 1 lb. Returnable: 90-Day. Thread Style: Coarse Thread. Screw Length: 3-1/2 in. Size: #10. Thread Pitch (mm): 3 mm. Threads Per Inch (TPI): 9. Screw Length: 3-1/2 in. Head Style: Flat Head. Package Quantity: 57. Size: #10. Fastener Material: Carbon Steel. Drive Style: Phillips. Measurement Standard: Inches. Fastener Type: Specialty Fastener