This electric engraving pen set includes everything needed for precision engraving on multiple hard materials including glass, metal, wood, and jade. The complete kit features 33 diamond burr bits in various shapes such as spheres, cones, and cylinders, plus one mandrel with three saw blades and five stencils for diverse creative projects. The rechargeable 300mAh battery provides up to 60 minutes of continuous operation and supports use while charging via the included Type-C cable. The compact aluminum engraver offers three adjustable speed levels ranging from 5,000 to 18,000 RPM, allowing precise fingertip control for delicate artwork and detailed designs. Built-in indicator lights display battery level, speed setting, and overload protection status to ensure safe operation and extend the tool's lifespan. The cordless, lightweight design makes it portable and suitable for both professional engravers and beginners. This engraving tool is ideal for creating personalized gifts, customizing jewelry, marking tools, or crafting decorative items. All accessories store conveniently in the included plastic case. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm under Proposition 65.