What you : the package comes with 10 pieces/ 2 sets different engraving drill bit set, which are enough to use and help you make all kinds of crafts without breaking the wood for a beautiful and fluid craft effect Durable material: wood carving bits are made of high-speed steel, sturdy and solid, durable and anti-rust, these burrs are intended for faster wood removal, you can pare much faster while leaving a smoother finish Applicable occasions: these wood carving bits can be widely applied in a of carving activities, perfect for engraving, drilling, beveling, chamfering, grooving, reaming, shaping, and hollowing Versatile compatibility: drill bit is compatible with standard power drills, tools and die grinders, especially effective in fluting flat surfaces, you just need to install it like any other typical drill bit and it's for some action Measurement: there're 5 different sizes of the carving drill bit, including . 3 x 3 mm, 3 x 4 mm, 3 x 5 mm, 3 x 6 mm, 3 x 8 mm in diameter (both and bit), different sizes can be adapted to different engraving needs Colour: Silver Material: High Speed Steel Package Contents: 5 x Three-flute milling cutter 5 x Engraving drill bit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.