Used for the first time today. It was on a 1/8" stainless steel case. The deburring tool removed the sharpness left by the milling cutter but did not remove the resulting edge. This way the lock nut does not fit flush into the body. As I have experimented more with this I will update this review update if there is anything useful to add. Look at my photo. The tool OD is greater than 3/4". The kit included a spare set of cutting tools. I know there are 3 pairs of spares as well. Also, I have itβ¦