The box arrived broken in a postal envelope. Pieces of Forstner lay scattered everywhere. The hull was made of thin slats of laminated wood, and the joinery on the corners was of poor quality. That explains why the box fell apart upon delivery. When trying to insert the bits into the marked slots, I had trouble figuring out the diameter of each bit. The imprint on the shank of the drill was distorted. The only way to accurately size the bit was to use a caliper. I chose this set because I prefer to keep beats organized. I thought each bit would be neatly arranged in order of size. I also thought the box would be strong. My expectations were not met and I returned this product.