Specification: Item Type: Electric Engraving Pen Kit Weight: 295g/10.4oz Material: Aluminum alloy and alloy steel Battery Type: Built in lithium battery (shipped with built in lithium battery) Battery Model: 501550 Battery Capacity: 500mah Pen Length: 12.5cm/4.9in Engraving Pen Diameter: 1.8cm/0.7in Package List:1 x Engraving Pen 30 x Engraving Drill Bits3 x Saw Blade 1 x Connecting Rod 2 x Drill Bit1 x Ceramic Grinding Head 1 x Charging Cable 4 x Template 2 x Storage Box  Features Cordless Engraving Pen: Can be charged or connected to a power source and comes with a Type C charging cable for fast charging. It can be charged to 80% in 30 minutes, and can be filled in 1 hour; The long acting battery can be used continuously for 1 ho Accuracy Grinding Engraver: Made of durable and lightweight aluminum. The ergonomic design of the pen body gives you precise fingertip control, and you can carry it with you, allowing you to enjoy a relaxing time of hand‑drilled jewelry making. One key s Indicator Light: This DIY electric engraving pen comes with a power indicator, a speed indicator and an overload indicator. You can know the use of the pen in real time, and you can adjust the speed you want to work according to different use situations. Metal Engraving Pen Kit: 360 degree vacuum self locking design, high concentric motor, grinding does not shake, does not burn, new technology built in locking ring, can be inserted and removed without tightening. Working in a low voice, do not worry abou Jewelry Engraving Machine: Includes 1 engraving pen, 4 templates (including numbers, letters, symbols, graphic templates), 30 engraving drill bits, 3 saw blades, 1 connecting rod, 2 drill bits, 1 ceramic grinding head, 1 USB Type C charging cable to supp