This oscillating multi tool is fitted with the high performance ec brushless motor these motors are extremely energy efficient resulting in much longer battery run times 30 more than a standard dc motor brushless motors are maintenance free compact and lightweight the motor gives the gop 18 v 28 similar performance to a mains powered equivalent the gop 18 v 28 features the latest starlock accessory mounting system starlock is a joint development by bosch and fein this snap in system