The 3725DEVS features a powerful 3.3 amp motor with 4,500-12,000opm. It has eccentric orbit plus rotation which duplicates natural hand sanding action. Soof hook and loop backing pad conforms to surfaces and lasts up to five times longer than conventional pads. Integral pad dampening and electronic variable speed provide a consistent finish. The new Bosch micro filter collects up to 120%more dust than conventional dust bags. Unit also features exclusive dual bearing mounting system.