Aoben Cordless Angle Grinder 4-1/2 Inch, 21V Battery Grinder Tool,, Polishing ?Brushless Motor?Electric angle grinder is equipped with a brushless motor. It has longer product life span, stronger power, faster heat dissipation and less energy consumption compared with traditional motor. ?Max 9500 RPM Speed?AOBEN cordless angle grinder can offer speed of max 9500RPM, widely used for a variety of applications-such as grinding metal, descaling, metal/steel/tile cutting, sanding, rust removal, and surface preparation, etc. ?2 Battery Packs?Powered by the 21V 4.0Ah large-capacity li-ion battery, AOBEN cordless angle grinder has long run time to work continuously indoor or outdoor, get rid of the limitations of the power cord.Compact and handy design makes it feels good in your hand during operation. ?2 Wheel Guards?AOBEN angle grinder tool kit comes with 2 protective wheel guards - a regular and a half-covered, to protect you from flying chips and sparks when performing cutting operations. ?Universal Size?4-1/2 inch angle grinder tool has 7/8" arbors. The spindle lock allows you to change grinding wheels faster and easier. And the auxiliary handle provides better control and comfort. ?What You Will Get?AOBEN provides you convenient and practical kit and perfect after-sale service! The kit comes with 1x Cordless Angle Grinder, 2x 4.0Ah Battery, 1x Fast Charger, 1x Handle, 2x Wheel guard, 2x Cutting Wheel, 2x Sanding Wheel, 1x Wrench; All in 1 tool case.