Surfprep’s 3″ x 4″ Electric sander offers a compact footprint designed to sand into tight areas and corners effortlessly. It is power packed and energy efficient with the lowest energy demands over any other electric sander. The annual electric bill for running Surge 4 hours/day,240 days/year is less than $7.00! The Surge can travel the world unlike air sanders. The tool is equipped with durable electric connections, two CPU boards, and a powerful ‘outer runner’ industrial grade motor. Its proprietary housing design with a built in cooling fan prolongs the life of the tool. Operational speeds of 7,000-9,000 RPM for customized finish.