What you get: 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 material: our wood carving bits are made of high-speed steel, sturdy and solid, and anti-rust, these burrs are intended for faster wood removal, you can easily pare away woods much faster while leaving a smoother Applicable occasions: these wood carving bits can be widely applied in a variety of carving activities, perfect for engraving, drilling, beveling, chamfering, grooving, reaming, shaping, and hollowing Versatile compatibility: our drill bit is compatible with almost standard power drills, rotary 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 ready for some nice action Measurement: there're 5 different sizes of the carving drill bit, including . 3 x 3 mm, 3 x 4 mm, 3 x 5