Saddle Height: 0.490 Aircraft Aluminum, Matte Black Finish Cross-Lock Mounting Design No Strip / Slip Torx Screws Made in USA Weaver Tactical Skeleton Weaver-Style Rings feature 4 screws for maximum security. Constructed of aluminum, these rings are designed to withstand grueling use in any environment.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }