Includes: 2 Scope Rings, Torx Bolts, Torx Key Materials: 6061 Aircraft Grade Aluminum Compatibility: Rifles with Picatinny rails Weight: 5.4 oz Lowest Setting, Center of Scope to Base: 1.25 in Highest Setting, Center of Scope to Base: 1.55 in Increments: 0.039 in Length: 1.625 in Width: 1.000 in Height: 1.875 in (lowest) 2.188 in (highest) Color: Black Warranty: Lifetime The Monstrum Tactical Adjustable Height Scope Rings are our most rugged and tailored optic mounting system yet! The unique extra wide design provides maximum resistance against recoil. The extra long torx bolts allows a more secure lock down for your expensive optic. The 6-point torx locking system prevents accidental stripping of the bolt. Our brand new, proprietary height-adjusting system allows you to control the height of your scope in increments of 0.039 inch (1 mm). These Monstrum Tactical Scope Rings position the center of the scope tube at a height of 1.25 inches to 1.55 inches from the base.