This Dremel 8240 cordless rotary tool kit is a powerful tool with a 12V Lithium-ion battery that provides long-lasting battery life. The kit comes with five pieces, including an attachment, and features a variable speed option that ranges from 5000 to 35000 RPM. The LED battery indicator helps you keep track of your battery life, while the EZ Twist nose cap and keyless chuck allow for easy accessory changes. This versatile tool is perfect for any DIY project, from sanding and cutting to polishing and engraving.