Includes: Scope Mount Set, Screws, Thumb Screws, Wrench Materials: 6061 Aircraft Grade Aluminum Compatibility: AR-15, Rifles with Picatinny rails Weight: 6.5 oz Length: 1 in Height: 2 in Color: Black Warranty:Lifetime The Monstrum Tactical Heavy Duty Scope Rings are our most rugged and heavy duty optic mounting system yet! The extra wide design - 30mm in width with 4 locking screws per ring - provide for maximum lockdown and performance. 30mm in diameter, the rings are built for use with any standard 30mm scope tube. The locking screw system allows for quick yet powerful tightening while protecting from the screws from stripping. See-through base allows for simultaneous use of low profile iron sights. Available in 2 Height Profiles Low profile: 0.625 inch of clearance from the top of your rifle to the bottom of your scope tube. High profile: 1.0 inch of clearance from the top of your rifle to the bottom of your scope tube