DNZ 1 piece scope mount for short action Winchester model 70 or Marlin SX7. The hole to hole spacing is .86 3.27 .86. Watch the 3.27(just over 3-1/4 inches). That is why this is for sale. My short aciton needed the WSM mount. It is new, only been out of the package long enough to figure out I ordered the wrong one. Call me at 918 200 865one. F2F only.