DescriptionIf you've been looking for some drill bits for your rotary tool, then you must not miss our engraving drill bits. Made of high-speed steel material, they are high-quality and durable. Different sizes to meet your different needs.Features- Color:Silver.- Material: High-speed steel.- The Longest Bit Size: Approx. 5.6 cm / 2.2 inch (total length); 0.6cm / 0.23 inch (sharp head). - Head Size: Approx. 0.2 cm / 0.07 inch;0.3 cm / 0.11 inch, 0.4 cm / 0.15 inch, 0.5 cm / 0.19 inch, 0.6 cm / 0.2 inch.- There are 5 different sizes of the head, which are 2mm, 3mm, 4mm, 5mm, 6mm.- Widely applied to various kinds woods for DIY, wood carving, engraving, model making, house repair and other wood workingprojects. - A must-have carpenter tool set to create your own masterpiece.- Strong hardness, not easy to break and deform. - The head is using a blade, which allows you to do delicate carving.