Profile: Harvest Tool Company, LLC specializes in underreamers, drilling bits and projectile tools. Our jet underreamer is available in a short pilot design with a short guiding nose or a long pilot design to provide a leading bit assembly. We offer wire line retrievable and expandable jet drill bit. Our expandable jet drill bit uses air, air mist, water or drilling mud circulation to open and our patented jet kerf design to cut soft and hard rock formations.