I am currently working with stand alone solar photovoltaic systems and when installing these systems the metal boxes of the housing house the inverters, converters, chargers. Controller and battery boxes, needs revision. For example, cable management can be made easier with the right hole size in the metal housing. Then this metal cutting kit will save you day, time and even money. A round carbide saw shank and additional bits are designed to cut precise round holes, while an over-drill stopβ¦