GRK Fasteners R4 Multi-Purpose Screw #10 x 2-1/2" Handy Pack

The GRK Fasteners R4 Multi-Purpose Screw in #10 x 2-1/2" size delivers professional-grade performance for framing, decking, fencing and more. Its patented underhead design features saw-blade-style cutting teeth and six self-contained cutting pockets for clean, crack-free countersinking—even in the hardest woods and brittle materials—without pre-drilling. The low-torque W-Cut thread and Star (T25) drive provide a wobble-free connection, while the Climatek coated finish resists corrosion in both interior and exterior applications.

Each handy pack includes 80 screws and a T25 driver bit, so you can start installing faster and work more efficiently on site. Whether you’re a contractor tackling structural applications or a DIY enthusiast building a deck, these screws offer consistent drawing power, reduced stripping and superior holding strength in a wide range of materials.

Key Features

• Patented R4 underhead with cutting teeth and six pockets for self-countersinking
• Star (T25) drive and bugle head deliver precision fit and flush finish
• W-Cut thread minimizes installation torque for faster, one-step driving
• Fast-Bite tip eliminates pre-drilling and boosts initial bite
• Six-point contact reduces stripping and wobble between screw and bit
• Climatek coated finish provides corrosion resistance in treated lumber
• Includes T25 driver bit for immediate use