• FlatLOK Structural Wood Screw - For fastening multi-ply LVL and girder trusses and more
• TimberLOK Structural Wood Screw - For attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, stair stringers and more
• HeadLOK Structural Wood Screw - For deck framing, stair stringers, attaching rigid foam (SIPs), fences, kitchen cabinets and more
• LedgerLOK Structural Wood Screw - For attaching deck ledger boards to the rim joist of a house with no predrilling
• ThruLOK Through-Bolt Replacement - The strength of a through-bolted connection for multi-ply beams, deck posts, carrying beams and more
• LedgerLOK Flat Head Structural Wood Screw - For attaching deck ledger boards to the rim joist of a house with no predrilling
• TimberLOK Structural Wood Screw - For attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, stair stringers and more

GRK's line-up of multi-purpose & structural fasteners include:

• GRK's finish trim head screws offer a professional look with a professional finish. Designed for most fine carpentry applications, as well as window extension jambs, joining cabinets, and more.
• GRK’s Low Profile Cabinet™ Cabinet screws are designed for fast cabinet installation with a washer-style head that seats flush which increases holding power.
• The RT Composite™ Exterior Trim Head screw is a specially designed fastener for attaching composite and cellular PVC materials.
• GRK's Finish Trim Head 305 Stainless Steel Screws are designed for applications that require superior corrosion resistance in outdoor environments with high moisture content including boardwalks, piers and docks on lakes.
• GRK's Finish Trim Head 316 stainless-steel screws are designed and recommended for applications where extreme corrosion resistance is necessary, such as environments with high exposure to chlorides and in coastal applications within 1 mile of the coast.
• GRK’s White Low Profile Cabinet™ screws are designed for fast cabinet installation with a washer-style head that seats flush which increases holding power.
• The White RT Composite™ Exterior Trim Head screw is a specially designed fastener for attaching composite and cellular PVC materials.
• RT Composite™ 305 Stainless Steel Screws are designed for applications that require superior corrosion resistance in exterior environments with high moisture content, such as boardwalks, piers and docks on lakes.

GRK Fasteners offer a line of specialty fasteners and accessories that include:

• Top Star™ Adjustable shim screw is a screw within a screw that allows you to install wooden doors or windows without the use of shims.
• Caliburn™ Concrete Screws heavy duty concrete and masory fasteners are professionally engineered with a patented thread design for ease of driving the screw into concrete and similar applications.
• MSS™ Metal Siding Screw has powder-coated head for a clean, finished look, this screw has an integrated washer-head and is complimented by a rubber washer below the screw head. This feature also helps protect the washer from prolonged exposure to the sun for long-lasting, secure siding installations.
• GRK Star Drive Bits provide six points of contact with our star drive head screws. The star drive helps to eliminate stripping for improved productivity.

GR's line-up of multi-purpose and structural fasteners include:

• GRK’s R4™ Multi-Purpose Screw is a versatile, code-approved fastener for hundreds of applications.
• GRK’s RSS™ Rugged Structural Screw is a structural fastener designed for ease of installation and the strongest of connections. RSS fasteners drive into most woods without the need for pre-drilling.
• RSS Black Structural Screws are designed for outdoor and decking applications.
• GRK’s R4™ Multi-Purpose 305 stainless steel screws are designed for applications that require superior corrosion resistance in exterior environments with high moisture content such as docks, boardwalks, and piers on lakes.
• 316 stainless steels screws are recommended for applications where extreme corrosion resistance is necessary, such as environments with high exposure to chlorides- such as de-icing salts- and applications within 1 mile of the coast.
• GRK’s RSS 305 stainless steel screws are designed for applications that require superior corrosion resistance in outdoor environments with high moisture content including docks, boardwalks, and piers on lakes.
• GRK’s RSS™ Joist and Truss Screw is a structural fastener designed for ease of installation and the strongest of connections for heavy duty roof and floor construction.