It has the same function like any other "damage-by-contact" traps. When placed on the ground, it can deal 40% of damage towards players (with bleed effect) and zombies. Due to its good damage and being able to be crafted with ease, it's a good starter defense measure. Has 800hp.
Wooden Spike Traps get weaker each time they're hit by a zombie, eventually breaking after being used too much.