ABS is defined as Acrylonitrile-Butadiene-Styrene which is blow molded plastic.
This is a specific type of plastic which is used in artificial nails for the actual tips. There are different options available, but some are designed to be more resistant to splits or cracks than others.
Daily Hair Tip
See a color specialist if you have tried coloring your hair with poor results. Don't ever try to fix color problems yourself.