Because it's intended for assembling an outdoor product

as their fences are perpetually exposed to the elements (rain

cannot be used with automatic openers

Designed for 1 5/8 to 2 3/8 round posts

these black vinyl wire ties are the go-to product

3' Yellow Surface Mount Non-Motorized Traffic Spikes Wire Ties Because it's intended for assembling1 4" steel top plate. Reliable zinc plated moving parts. Load rated for 7. 5 tons or 15,000 lbs per single axle load. Manual Traffic Spikes Directional Control Directional Traffic Control, also serves as speed bump. Rugged, durable design in Standard Duty and Heavy Duty construction. Top Down design make maintenance easy and fast. Unique curved tooth, fishhook design. Durable spring loaded teeth with counter balanced back up. Zinc Plated moving parts