This Micro Drill Bit Set is specifically designed for scale model making, with sizes ranging from 0.1mm to 1.0mm. Made of carbide, these drill bits are durable and precise for delicate work on Gundam models and other small-scale projects. The set includes 10 pieces, all contained in a plastic storage case. Perfect for hobbyists looking to create intricate holes with precision and accuracy. These are good quality drill bits with a good 'bite' into the material, especially plastic. Care should be taken when using the bits to avoid damage as some of the smaller sizes are very fine.