Product Liability Law deals with the liability of commercial product sellers and distributors for harm caused by their products. Some points of serious contention include:

Manufacturing Defects -- when the product departs from it's intended design, even if all possible care was exercised.

Design Defects -- when the foreseeable risks of harm posed by the product could have been reduced or avoided by the adoption of a reasonable alternative design, and failure to use the alternative design renders the product not reasonably safe.

Inadequate Instructions or Warnings Defects -- when the foreseeable risks of harm posed by the product could have been reduced or avoided by reasonable instructions or warnings, and their omission renders the product not reasonably safe.