Dremel 107 3/32 In. (2.4 mm) Engraving Bit Ideal for shaping, hollowing, grooving, slotting, inlaying and making tapered holes For wood, fiberglass, plastic and soft materials Use higher speeds for hard woods, slower speeds for metals and very slow speeds for plastics Ideal for use on curved surfaces DIMENSIONS: Contents: 2 Bits Warranty: Product Defects Only Description: Engraving Bit Bit Diameter mm: 2.4 mm Color Code: Teal Overall Length: 1.5 Material: High Speed Steel Model Number: 107 Bit Diameter Inch: 3/32" Shank Diameter: 0.125