Easy ‘Clic’ mechanism for turning or replacing delta tip, and for mounting special attachments without using tools Multi-shape sanding base for both large surfaces and corners KEEPCOOL™: The patented battery cooling technology that ensures up to 25% longer run time and 2x the lifetime Digital brushless motor: More power, more efficiency and 10x longer lifetime Three special attachments for sanding hard-to-reach surfaces Patented internal set-up and VRS for extremely low vibration ACTIVCELL™: Patented intelligent battery and tool interaction, for maximum performance and battery protection Lithium-Ion technology: no memory effect, no self-discharge and always ready for use Ergonomic compact palm-grip design for easy one-handed use PWRCORE 20™: Industry-leading advanced battery technology, to power all SKIL ’20V Max’ tools