I am surprised by the sturdiness of even the smaller drill bits. I’m using this kit specifically with 3D printed objects (PLA only so far).So far, the quality seems to be pretty decent. There is two different colors, gold and silver. Then, 3 sizes of both colors.I would classify the sizes and small, medium, and large.The case included feels solid and the doors over the individual compartments open and close with ease. Each compartment is numbered and include a braille translation by each number. I colored the numbers and bumps with a sharpie marker specifically for this review so they could be visible.The hand drill fits nicely in my hand and grips all of the bits included quite well.The butt of the driver rotates smoothly and effectively, making drilling with the smaller bits easier and functional, even with one hand.This kit includes 10 drill bits with their own case as well.All together, I would say this is a good value for the price, and overall quality and functionality.