These will do the job, but not with the screws that come with it. On a one inch diam. scope the original screws are about halfway into the thread depth and I stripped one with basic hand tightening. After replacing all four screws with 4mmx16mm fine thread, socket head type screws from my local national chain hardware I am confident in the scope rings ability to hold a scope or accessory to a rail. The new screws are not flush. The other weakness is the thin rail clamp on the screw side. Given the total expense w/screws they are not a great value as some HD scope rings can be had for a similar price. WM site to store is a main highlight as it's faster/cheaper compared to other online shipping options.