ITEM NAME:New High Quality Sharp Tungsten Steel Tip Scriber Clip Pen Ceramics Glass BX 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.