The Premium Ace™ directional drill bit is our best Ace bit, offering superior durability, longevity and wearability to horizontal directional drilling contractors who need a tool for high risk, aggressive ground conditions. Greater level of carbide coverage compared to other HDD bits increases reliability. Aggressive tapered bit front improves penetration rates. Ideal HDD tooling for productivity in heavy cemented cobble, hard packed soils and softer shale.