The Strong-Drive SDCP Timber-CP screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber construction, mass timber construction and general interior applications. These partially-threaded, 0.315"- and 0.390"-diameter structural fasteners are designed to pull structural members together with superb holding power. The large flat head with underhead nibs provides for clean countersinking. The SDCP Timber-CP has a yellow zinc coating, a robust knurled shank and Type-17 point for fast starts and low-torque driving.