Marking Tools descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Double-end Sharp, Tungsten Steel Tip, Scriber Clip Pen For Ceramics Glass,. Features: Double Ended Tungsten Steel Pen. Includes Screw on End Cap for One Side So You Know Which Side Has Not Been Used Tungsten Steel Tip Marks Hard Materials Including Hardened Steel, Stainless Steel, Ceramics and Glass. Incredibly Hard & Sharp Tungsten Steel Tip Makes Precise Lines and Characters on Almost Any Metal. Specifications: Material: Tungsten Steel Tip Length: App.137mm/5.39in Color: Black+Silver Type: Carving Chisel Handle Shape: Round Blade Material: High Carbon Steel Use: Metalworking Package Contents: 1 X Scriber Clip Pen . Products number : SOMONO115490