FastenMaster 10 In. HD Timberlok Structure Screws, 50 Pc are designed for heavy-duty applications requiring strong holding power without the need for pre-drilling. These screws feature a countersinking head style and are heat-treated to enhance strength, making them i for driving through pressure-treated beams. The heavy-duty threads ensure a secure grip, while the epoxy-coated carbon steel construction provides durability and corrosion resistance. Each package includes 50 screws and a 5/16" hex drive bit for easy installation using a 1/2" high torque, low RPM power drill. These screws are also easily removable, ing convenience for structural projects. Model Number: FMTLOK10-50