Meet the FastenMaster FMTLOK04-250 TimberLOK 4" — a purpose-built wood fastener engineered to speed up your toughest projects. With a sharp point and aggressive threads, TimberLOK slices through dense woods without predrilling and delivers stronger shear strength than traditional 3/8" galvanized lag screws. The unique countersinking head sits flush, giving you clean, professional finishes on deck framing, fencing, and any post-to-beam connection.

Why this TimberLOK stands out for real-world builds:

• No predrilling required for most woods, saving time and reducing labor on every installation.
• for rapid, reliable penetration into dense lumber.
• Superior shear values compared to standard lag solutions, improving joint stability under load.
• Countersinking head design creates a flush, smooth surface that looks great and resists snagging.
• Includes a free driver bit (5/6 inch) with each bucket for immediate use—no guessing on the right bit size.
• American-made, built to rigorous standards and backed by a reputation for durability.

Who can benefit from TimberLOK FMTLOK04-250?

• Professional builders and seasoned DIYers tackling deck framing, fence construction, or any post-to-beam connection.
• Garden and landscape projects replacing galvanized spikes in raised beds, edging, retaining walls, or sturdy plan supports.
• Anyone looking for a fast, reliable fastening solution that reduces the number of steps from start to finish.

Practical tips for best results:

• Use a drill or impact driver with the included driver bit to achieve consistent driving depth and avoid over-torquing.
• Apply TimberLOK to clean, dry wood for optimal bite and holding power—avoid overtightening which can trap and stress the material.
• For outdoor applications exposed to the elements, consider treating surrounding wood surfaces to extend joint life and maintain aesthetics.

Product specifications at a glance:

• Length: 4 inches
• Bucket quantity: 250 pieces
• Includes: free 5/6 inch driver bit
• Origin: American-made