The Altex Preferred MFG 17.8" x 11.8" Large Anti-Static Silicone Magnetic Repair/Soldering Mat features 124 screw positions and 11 screwdriver storage holes for effective tool organization. It also comes with 4 magnetic parts areas, 14 grooves, 42 precision parts classification positions, and a built-in scale measuring tape. It is made of a high-temperature resistant silicone with non-toxic and odorless properties, making it safe and easy to clean. Perfect for workbench, soldering iron, cell phone, and laptop repairs.