1. Head with magnetic design, strong magnetic adsorption 2. Knurled handle design, non-slip wear-resistant, comfortable to hold 3. Tungsten steel nib with 90-95HRA hardness 4. Mainly used for marking ceramic, tile, glass, marble and other materials 5. Material: aluminum + tungsten steel 6. Size: about 13.3 x 0.8cm 7. Weight: about 16g