Frequently Asked Questions Will this work on all egg sizes? Yes, this tool is designed to crack eggs of varying sizes, from small to large. Simply position the cutter, press, and lift – it works smoothly every time. Is it dishwasher safe? Absolutely! Will the black color fade over time? Can it be used for both raw and hard-boiled eggs? Yes, but while it works perfectly on raw eggs from the first try, cracking hard boiled eggs cleanly will require some practice first How to use