Do NOT run a Remington rear entry wrench into a Surgeon action. Surgeon has an anti-bind rail built into the left side of the action (at least the tactical action) designed to prevent brass form lodging in the bolt run. If you run a remington clone wrench into the surgeon action it has no cut out on the wrench and will potentially destroy the anti-bind rail inside the action, thus preventing you from re-installing the bolt. Teh rear-enty surgeon wrench has been relieved to allow for passage of the anti-bind rail without damage.
I use a remington port wrench on my two surgeon rifles (one in .260 the other in 7WSM) . From teh Port, they are the same and the REmington wrench works fine.
JeffVN