It's early for Halloween, but this look is coming out of Europe for all seasons. They are titled as stiletto nail tips and they are the rage in Europe. Will they make a splash in the US? They don't need to be just for Halloween and black or red in color. As the picture shows they could achieve a great look. Bring the trend into your salon and get a premium price for this service.
Here is a link to a company selling the nails.
Stiletto Nails from Star Nails