Use with electric engraver,Ideal for any arts and craft project, the Diamond Engraving Point is designed for hard-surface engraving applications to create fine lines to deep groovesEngrave or decorate a wide variety of materials including metal,steel, plastic, glass, ceramic, granite,wood and leather,and other hard substratesMaterial:Carbuye tip,Steel bodyEngraved head dia: 3mm(0.12"),Length:20mm(0.79")Package including 10pcs engraving bits