[Material]: Made of high quality white steel, long service life, strong and sharp, corrosion resistance, excellent wear resistance. 5 engraving tools packed in a transparent box. [Three-edged design]: High efficiency, it is the ideal tool for precision machining of deep grooves, V-grooves, curved patterns, lines, etc. The three-blade design removes hole chips quickly and automatically. Ideal for engraving, engraving, grinding, drilling, etc., and leaves a smooth and smooth surface. [Perfect tool for DIY and home repair]: Widely used for DIY, carving wood, model making, making animal houses, house repair and other carpentry work of all kinds of wood. A must-have carving tool for creating your own masterpiece. 5 different sizes (3mm, 4mm, 5mm, 6mm, 8mm) to meet different needs. [Universal Shank]: 3mm shank is suitable for most rotary tools with three jaw chuck. Easy to replace. Note: The data is manual measurement, please allow 1-20cm error, due to differences between light and screen, there will be some color difference, the specific received in kind prevail.