The TIMCO Twin-Threaded Countersunk Silver Woodscrews feature a traditional twin-thread design with single lead start for fast installation in soft timber applications or masonry with plastic plugs. These high-quality screws are manufactured from C10-18 carbon steel with surface hardening up to 750 HV to prevent torque shearing under load, while maintaining core hardness up to 450 HV for improved ductility. The double countersunk head reduces likelihood of head shear and assists completion of countersinking, with 60° twin-threads providing faster insertion and greater pull-out resistance. Each screw features a 25° sharp point for fast start and improved thread acceptance, making them ideal for professional timber construction applications.