Rockwheel T855 trencher features heavy-duty, CAT 335-hp. diesel engine and TEC 2000.2 trencher electronic control system that monitors engine r.p.m. to provide optimum power to cutter wheel. Rockwheel has 1-in.-shank rotary carbide teeth to run smoothly through rock at digging depths to 54 ins. and cutting widths from 6 ins. to 14 ins. Boasts infinitely variable tip speeds up to 750 f.p.m. to suit job site needs.