Durable materials: The glass scriber has a durable tungsten carbide tip and aluminum body, and can hard materials, including hardened steel, stainless steel, and glass.Permanent magnet: These scribing have a permanent magnet on the tool, which can and steel scraps from inaccessible .Easy to use: convenient pen design and convenient pocket clip, knurled aluminum handle maximum control and comfort. When not in use, the tip of tungsten carbide can be reversed.Widely used: These tungsten carbide scribers can be used to , etch, or any type of metal, glass, concrete, gem, ceramic tile, ceramic, plastic, etc. This utility will you with accurate thin line marking capability. It can also be used as a gift for carving lovers.color:SilverMaterial:MetalPackage Contents:4 x tungsten carbide scriber8 x marking headsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.