The X Caps by Seekins Precision delivers maximum customization options. They are available multiple ring sizes as well as in either 4 or 8 precision mounting locations which can be used for exact and repeatable mounting accessories like the Seekins Diving Board and other accessories. This allows the user to install accessories such as laser range finders, red dots, and other augmentations directly to the scope mount. The X Caps are made from 7075 aerospace-grade aluminum with a black anodized finish, making them lightweight and extremely tough. The X Caps are also compatible with ANY existing Seekins Scope rings. Like all products made by Seekins Precision, the X Caps are held to extremely high standards for quality. Features:4X Cap- Side or angle mounted accessories with 4 precision mounting locations8X Cap- Top, side, or angle-mounted accessories with 8 precision mounting locationsSizes: 30, 34, 35, 36mmAerospace grade 7075 aluminum with a black anodized finish Seekins Precision 4X Accessory 35mm Ring Cap 0010650152-F, Ring cap: 20 inch-pounds