Needing name of a device used in parking lots and garage to avoid car thefts. Common name " shark tooth".

Question

It is like a collapsible strong saw with the points up that smash up car tires if they pass over. Besides is used by the police to avoid people on the run from the law.

Answer 1

tire spikes

Answer 2

This won't stop your car from being stolen. You need an independent immobilizer and a park brake locking system installed so that your car can not be flat towed by pro car boosters.

Spike strips, caltrops.