You’ll want one - Wheeler Professional Scope Mounting Kits

Good kit, good instructions, good overall value. I love the little “FAT” wrench! It makes it so easy to get all the screws evenly torqued I wonder how I ever got along without it (and realized how badly I had been over tightening everything). As for the actual lapping it was very interesting to see how little contact was being made at first; even on a $100+ mount! I did find that automotive type valve lapping paste did better than the stuff in the kit. It was a little finer (although still 220 grit) and a little thinner (water based) and would recommend it. Otherwise no complaints here. Now that I finally made the jump to high quality optics I felt obligated to offer them the best possible execution. For years I would just slap whatever cheap scope on any old rings and be done... such a waste! Now that I have the right tool for this job I actually went back and re-mounted some other units. Never again will I mount a scope without first lapping the rings! For a $1000+ optic a $100 tool is cheap insurance.