This bit set has all the popular sizes at an unbelievably low price. Shipped fast too.
Verified purchase: Yes | Condition: New
Great for the Diy with a drill press that speed can be set .
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They do fine on mild steel, cast, SS, bronze and brass. Regarding aluminum and copper, you really need to know what you're doing if you work with either of those materials. Probably why the last reviewer gave 1 star. Talk to a real machinest if you have any problems.
Verified purchase: Yes | Condition: New
They claimed for use on all materials. Not true wouldn't go through aluminum.
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I have not used these much but when needed they are awesome for creating large holes in thick materials.
Verified purchase: Yes | Condition: New
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