This all steel Long Side Rail mount can also be clamped on Accumount steel Swiss K31 clamp-on mount. The diameter of the rings is 26.5mm, it also comes with 4 steel 1 inch inserts so that 1 inch scope can be installed. The 3/8” dovetail side base fits on German K98, Swedish M38/M96 and Yugo M48, M48A and M24/47. It may also fit Spanish Mausers and Turkish Mausers. This mount came with 2 square head windage screws, it also came with 2 slot head windage screws for your convenience. This package includes every thing in the picture.