Pengo is excited to introduce the TriDent series of holders and teeth. The patented TriDent® holders are designed to work with three different types of teeth, the Strata Conical Tooth, a Non-rotating Radial Tooth and a Non-Rotating Wedge tooth. 1, 3, 7 – It’s That Easy! One holder coupled with three types of teeth provide drillers seven different soil conditions to drill in. Whether it is gravel, fracturable rock or non-fracturable the TriDent teeth provide maximum performance over standard teeth.