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
Gently scrubbing your scalp w/your fingertips or fingernails when showering is a fab way to give dandruff the brush off. When combined w/ a good dandruff treatment shampoo, light finger scrubbing removes dead skin cells from the scalp.