KNIFE VINYL H/DUTY #HC300. This product is a hook axe knife made of carbon steel. It has a sharp, curved and extra heavy tip, also made of carbon steel. Its structure allows you to make even, accurate cuts with ease on hard-core vinyl or softer materials. This tool was created for everyday use by the bricklayer, asphalt paver, plaster or drywall craftsman. Its package contains 5 knives.