Description:brand new and high quality Features:USB Wirele Enhancer: These engraving tools come with a lithium battery that can be charged via the USB interface. After a full charge, up to 30 minutes of wirele use. Easily help you achieve better engraving craftsmanship.Visible Speed Adjustment: The metal engraving pen is equipped with an excellent motor with up to 10W of power when working. 3 positions to adjust the rotation speed, from 5000 to 25000 rpm, for different situations. The lowest speed will allow you to polish your nails safely, and the highest speed is also used for metal engraving.A Variety of Grinding Bits: These metal engraving machine sets include 30 rotary drill bits, 2 drill bits, 3 blades, all of which are enough for engraving, engraving, grinding, polishing, etching, routing, grinding, drilling, cutting .Start the art of lettering today: This portable and compact etching pen allows you to enjoy easy hand-drilling jewelry manytime. Suitable for metal, gla, ceramic, leather, wood, jewelry, stone or statue.Best for Beginners: Our metal engraving tools are easy to operate and especially suitable for beginners. Make key chains, DIY necklaces or give gifts with our kits. Specifications:Color:Silver, Rose GoldMaterial:DiamondDrill 1: Approx.1.0mm/0.03inDrill 2: Approx.1.5mm/0.05in(More detailed,please see photo.)Quantity:1 Set Note:Please allow a little error on the size due to manual measurement.The color might exist slightly difference due to different displays. Package Includes:1pcx Engraving Pen1pcx Data Cable30pcx 2.35 Rotation Bits2pcx Drill Bits (1.0mm, 1.5mm)3pcx Stainle Steel Cutting Disc (22mm, 25mm, 32mm)1pcx 2.35 Shank Post