ITEM NAME:High Quality Sharp Tungsten Steel Tip Scriber Clip Pen Ceramics Glass Shell M& High Quality Tungsten Steel Tip Scriber Clip Pen Ceramics Glass Shell Metal Construction Marking Tools BS Description Material: tungsten steel nib Specifications: conical Shank Diameter: approx 145 mm Apply in ceramics, glass, shells, metal portray board, lettering, marking, etc. package:1 Pcs.Material: tungsten steel nib.