The replacement Diamond Point's hard-surface is ideal for extended use applications when using the Dremel electric engraver. -Additional diamond point for the Dremel 290 Engraver -Use this point for continuous duty or commercial work -Can also be used for decorative engraving -Works on steel, chrome, titanium, granite, and other hard substrates 3.2-by-1.9-by-0.2-inches at 0.8-ounces -Designed for hard-surface engraving applications and continuous use -Use this point for normal applications -Perfect for dozens of hobbies and crafts -Create fine lines to deep grooves (User Tips) Create fine lines to deep grooves.