Install wooden posts permanently or temporarily without digging. For heavy-duty applications such as long runs of fencing, corner and gate posts, larger wooden gym sets, detached patio decking, wooden sidewalks, seasonal docks, and more. Removable Forcefit clamps and 2-piece construction, increases unit strength and eliminates welds which are potential weak spots. Reverse spike blades offer lateral soil resistance, increased stability, and allows driving without rotating for easy post alignment. Welded steel construction with high tech baked-on finish, rust resistant and 100% environmentally safe. Application information and installation instructions labeled on each. Green Commission finish. 13 Gauge - For 4 x 4 Posts. Take the work out of fence post installation and repair with the Speedpost, SFP series, and Speedmender, SMP series. The Speedpost is used to install fence posts without digging post holes or pouring concrete. The SFP30 is for 6´ fence posts. Step-by-step installation instructions are labeled onto each product.