Heavy-duty bright steel spike with a smooth round shank, flat head for striking, and a sharp diamond point. The bright (uncoated) finish is intended for general utility work where surface coating is not required - use galvanized or coated spikes for permanent exterior installs that need rust resistance.

• Material: Bright (uncoated) carbon steel
• Head: Flat for striking
• Point: Diamond
• Shank: Smooth round
• Size: 5/16" x 12"
• Pack: 50 Lb Box (approx. 125 spikes)
• Manufacturer part number: 10405012

Tip: Pre-drill the upper timber when pinning multi-course walls so the spike pulls the courses together rather than splitting the top timber.

For three-course 4x4 retaining walls, double-stacked 6x6 timbers, or driving into firm subsoil for maximum hold against settling and frost heave.