GRK Fasteners-96025 RSS-185 10 by 3-1/8-Inch Structural, 50 Screws per Package, Gold. GRK RSS Rugged Structural Screw has a patented design and is made of specially hardened steel to provide customers with high tensile, torque, and shear strength. The sharp threads and points instantly bite the material, including hardwood, reducing the splitting effect due to smaller shanks.