(Reuters) – Equipment rental firm United Rentals on Wednesday posted a 6.25% rise in fourth-quarter profit, on the back of robust demand for industrial tools. U.S. companies have ramped up their manufacturing activity over the past two years after the pandemic crimped their ability to produce enough products to meet demand. United Rentals also authorized a $1.5 billion share buy-back program it is expects to be completed by the end of the first quarter of 2025. The rental firm operates across North America and rents out equipment to major industries covering manufacturing and construction sect…