1. Pickup all spikes from the ends not the side, and yes, I did have to make this #1 x.x

2. As with the other commenters, it blocks a lot of creatures from passing it. In particular, the gaps created under behemoth gates & etc.

3. They snap together like fence foundations & can be connected to several things.

4. On pve, they don't seem to hurt your dinos unless you're involved.

Your dinos take damage from it when mounted

Pretty cheap and effective way to keep base safe from things like raptors