Meet the FastenMaster FMTLOK10-12 TimberLOK 10" - 12 pc clamshell, a purpose-built wood fastener designed to simplify heavy-duty timber connections. TimberLOK's sharp point and aggressive threads bite into even the densest woods without predrilling, delivering stronger shear performance than 3/8 inch galvanized lag screws.

The unique countersinking head creates a flush, clean finish in wood-to-wood assemblies, making it ideal for challenging projects like deck framing, fencing, or any post-to-beam connection. It’s also perfect for replacing galvanized spikes in raised flower beds, landscaping, or retaining walls—no need to swing a sledge. TimberLOK zips right in, saving time and effort on every job. Each pack size includes a free 5/6 inch driver bit, and TimberLOK fasteners are American made.

Why the TimberLOK FMTLOK10-12 stands out

• No predrill required: TimberLOK's sharp point and aggressive threads penetrate even dense woods quickly, reducing labor and installation time.
• Stronger shear performance than traditional 3/8" galvanized lag screws for wood-to-wood connections, giving you more dependable, long-lasting holds.
• Flush, countersunk head for a seamless surface on decks, fences, and other wood-to-wood assemblies.
• 12-piece clamshell with a free driver bit: includes a 5/6 inch driver bit to get you started right away.
• American-made: built in the USA to meet demanding construction standards with consistent quality.

Ideal uses and practical applications

• Deck framing and secure post-to-beam connections where a clean, flush finish matters
• Fencing, gates, and rail systems that require dependable timber-to-timber fasteners
• Replacing galvanized spikes in raised flower beds, landscaping features, or retaining walls
• DIY wood projects that demand quick install, strong shear strength, and a professional finish

Installation tips and best practices

For best results, drive TimberLOK straight with steady pressure using the included driver bit. Let the sharp point do the initial biting, then apply even torque to achieve a flush seat without overdriving. No predrilling means faster progress, but ensure the surface is clean and free of debris to prevent binding. Use in appropriate wood species and avoid over-tightening to preserve wood integrity and fastener performance.

Specifications at a glance

• Length: 10 inches
• Pack size: 12 pieces
• Head style: Countersinking
• Includes: free 5/6 inch driver bit
• Made in the USA: yes
• Product line: FastenMaster FMTLOK10-12 TimberLOK