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.