The T60 Mega drill system is a straight-hole drill system manufactured by Rockmore International Inc. The system enables small and large mining operations to drill a variety of hole sizes, and the 60-mm rod allows operators to drill using bit diameters ranging from 4.5 inch to 6.5 inch. Rockmore also employs a male-to-male coupling system - the use of coupling sleeves is said to provide more flexibility to help reduce the occurrence of rod damage. Rockmore International Inc.