The Rotary Tool Kits 3.7V Li ion Mini Cordless Rotary Multi Tool Kit Sander Grinder by CHOKMAX is a versatile tool kit designed for various tasks such as polishing, cleaning, engraving, and grinding. With a powerful Lithium-Ion battery, this compact and cordless tool kit includes a depth gauge for precision work. The kit also features a heavy-duty design, side handle for control, and a maximum rotational speed of 16000 RPM. Perfect for DIY enthusiasts and professionals alike, this tool kit comes with bits and batteries included, making it a convenient addition to any workshop.