· Coarse Sander, Fine Sander And Polisher In One Tool · Push-button Switching Between Eccentric Sanding (for Scratch-free Fine Sanding) And Random-curve Sanding (for High Abrasion When Coarse Sanding Or For Polishing) · Electronic: Continuously Variable Speed And Stroke · Smooth Running · Optimised Dust Extraction Means Longer Life For Abrasive Discs · Brake Prevents Excess Speed In No-load Condition · Anti-static Function