This particular model is Caterpillar's smallest and most compact roof bolter. It can be productive in the smallest spaces and in seam heights as low as 32 inches (81 cm). It has a single arm design with automatic temporary roof support and overhead canopies for the operator when tramming and bolting. While tramming, the operator can choose from two speed settings, and power is applied at each wheel to help it maintain traction in soft ground. Both simple and efficient, the RB120 is designed to get in and out of an entry quickly so production can resume.