Just as there are a myriad of ways to fit/chamber a barrel, there are at least as many designs of action wrenches. I tried some of Brownells wrench heads, when I didn't think I had time to make what I needed, and they were kinda' "iffy". The one for the 788 didn't work at all. The one I bought for Browning A-Bolt was OK. I'm using the same wrench (and barrel vice) that I made from prints supplied when I went to gunsmithing school, 20+ years ago. I've used Delrin, aluminum, and steel for barrel bushings for the vice, and keep 1 1/2" diameter material in these types on hand to make another set of barrel bushings, when needed. I've probably got/made three dozen sets of barrel bushings, ya' always need something different. As I've used many different actions for customs I've built, I've had to make a couple 'adaptors" for my wrench and I've had to make several "in-line" wrenches to fit some of these customs. There's 'no end' to the tools needed to do decent work. Brownells gets enough of my money. If I can and have time, I'll make what I need. If you haven't the time or the means to make, I guess Brownells wrench & vice are as good as any , for 'store bought' tools.