I ordered this bit to add an extra hole to my kitchen sink for a soap dispenser. The only drawback I encountered was getting the drill chuck tight enough to keep the bit from slipping. After resolving that issue with some channel lock pliers; the bit went through the stainless steel like butter. These bits are reaqlly expensive at my local Home Builder store and reasonably priced on Amazon. Again Amazon wins out for quality, shipping, and value. I recommend this bit but have no clue as to its extended use.