I have run FO on some revolvers but this was the first set I've purchased. Easy install on both the front and rear sight. Tools are useful but pickup a cheap pusher if you don't have one (it will make fine tuning the sight way easier). With 147gr my sp-01 was shooting high. Talked with customer service, calculated everything on the phone and am looking forward to a new front sight in a few days. Great company who knows their stuff and stands behind it.