General Tools 88 Tungsten Carbide Scriber The General Tools and Instruments 88 Tungsten Carbide Scriber is a great choice for both machinists and hobbyists. This engraving pen comes with a chuck for reversing tungsten carbide point when not in use; this scribe is an essential machining tool The durable etching point works effortlessly on hardened and stainless steel, ceramics and glass The scriber point is also easily replaceable, providing like-new performance for years the convenient pocket clip and reversible point make this scriber an ideal travel companion for those on the go