Features: _x000D_1. The head of the pen adopts special alloy steel, quick operation, flexible and comfortable to use. _x000D_2. Depending on the difference of the material, depth may be up to 1 mm. _x000D_3. The main body is made of high quality synthetic material, lightweight and convenient to use._x000D_4. Compressed air, energy saving and eco-friendly. Noise reduce intake pipe, comfortable to use._x000D_5. Works great on metals, wood, plastic, glass, stone, china and other hard material, great for marking tools, components, and more._x000D__x000D_Specification:_x000D_Item Type: Pneumatic Engraving Pen_x000D_Material: Aluminum alloy, Iron, Steel _x000D_Model: KP-612_x000D_No-load Speed: 3800 times / min _x000D_Working Pressure: 0.6 mpa _x000D_Inlet interface: 1/4" _x000D_Noise Reduction Tube: 1.5m _x000D_Package Weight: Approx. 309 g_x000D__x000D_Package Include: _x000D_1 * Pneumatic Engraving Pen 1The head of the pen adopts special alloy steel, quick operation, flexible and comfortable to use 2Depending on the difference of the material, depth may be up to 1 mm 3The main body is made of high quality synthetic material, lightweight and convenient to use 4Compressed air, energy saving and eco-friendly. Noise reduce intake pipe, comfortable to use 5Works great on metals, wood, plastic, glass, stone, china and other hard material, great for marking tools, components, and more