The Simpson WSV134S Strong-Drive WSV Subfloor Screw is a high-quality fastener designed for subfloor installation. With a #9 x 1-3/4 inch size and a length of 4 inches, this screw is ideal for securing subfloors efficiently and effectively. Manufactured by Simpson Anchors, a trusted brand in the industry, this screw is built to last and provide a strong, reliable hold. Perfect for various industrial and commercial applications, this 2000 pack of subfloor screws is a must-have for any professional contractor or builder.