1/4 In. diameter structural wood screw is ideal for various connector installations and wood-to-wood applications. No predrilling. Easy driving 4CUT tip has a square core and serrated threads to reduce installation torque and corrosion- double barrier coating equivalent to hot-dip galvanization. 3/8 In. hex washer head is stamped with the No-Equal sign and faster length for easy identification after installation. WARNING! This product can expose you to chemicals including wood dust which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov -