A very strange film. A bunch of aliens, including John Carradine, are on Earth and arranging for a couple of redneck mechanics (Neville Brand and Aldo Rey) to kidnap horny teenagers on vacation and bring them to a "hospital" where the teen's blood can be drained so helping the aliens continue living.
Truthfully though the mechanics are pretty inept (they wear masks to hide their identity - though forget to take their name badges off) and their prey usually escapes... unfortunately the teenagers are even more inept at trying to make good their escapes and get re-captured. Much of the film is a rather messy and silly extended torture and attempted rape scene in the garage including some gratuitous use of power tools. Much of the rest of the film is soft core porn.
It is exploitative nonsense for sure. The film is very trashy and not very pleasant if we are to be honest. Scores high for gore and female nudity, scores low for story and coherence.