Product Description FastenMaster FMTLOK06-250 TimberLOK Heavy-Duty Wood Screw, 6 Inches, 250-Count Fasten master, 250 pack, 8 inch timberlok screw, no pre-drilling, timberlok drives right through pressure treated wood & reduces labor time with quick & safe 1 step installation, guaranteed corrosion resistant performance, bucket. Screw Dimensions: Height .156" - head diameter 0.5" - Use T-25 Torx These screws are coated with a black exterior coating for use with ACQ lumber and exterior use shaped notches in the threads for cutting board fibers at lower touque settings Screws have been through 1,200 Hours of salt spray testing without coating or screw failure Modified truss washer head wood screws with great compression strength From the Manufacturer Save time, money, and labor costs. TimberLOK's sharp point and aggressive threads penetrate the densest woods without predrilling and provide stronger shear values than 3/8 inch galvanized lag screws. TimberLOK's unique countersinking head design is perfect for your next wood-to-wood project, whether it be deck framing, fencing, or any post to beam connections. It’s also perfect for replacing galvanized spikes in raised flower beds, landscaping, or retaining walls. No need to predrill and sledge a spike. TimberLOK just zips right in. Each pack size contains a free 5/6 inch driver bit. TimberLOK fasteners are American made.