They appear to be well made and with the thin steel I used they worked well. Interesting box of bits. The box is fragile. The largest piece doesn't fit in well, so when closing the case you tend to push on the top and bottom to close it completely. This pressure pulls the sides of the fuselage away from the fuselage frame. It looks like it was just glued on. The side doesn't separate, but now it's definitely dangling and making noise. The case keeps things tidy though, so be careful with it. This set is good for quickly drilling holes in wood with a power drill. A nice addition to your tool collection. I would recommend it if you need it.
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