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3 answers
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what kind of drill bits are these? Trying to drill through flat side of a fence T-Post

I'm trying to drill through 1/4" hard steel. the thicker bit went through relatively easily one time, but on the second go just spins. the thinner bit did not go far .. i think both need to be ...
Hell.Bent's user avatar
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1 answer
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How to choose hole sizes when building a sorting sieve?

I'm planning to build a sorting sieve out of a set of plastic containers with holes drilled in the bottom. The container with the largest holes will be on top and the one with the smallest holes ...
Stephen Ostermiller's user avatar