Powerful - with a 1 amp motor and 12,000 tracks per minute, it delivers smooth performance in a variety of sanding applications. Dust - Between the microfiltration system and the 1-1 x 4 inch (3.9 x 1.2 cm) vacuum dust port, you can choose the way you like to prevent dust from entering. Easy sandpaper change - The carabiner system makes it easy and fast to change sandpaper. Add a paper replacement. Balance reduces vibration and improves comfort. Low vibration - With its ergonomic design and soft rubber grip, your hands stay comfortable while balancing balance reduces fatigue caused by hand vibration. So you can work longer. Easy to open and close - the dust seal switch enables a worry-free flip switch during application.