The Wheeler Sporter Bi-Weaver Style/Picatinny Rings are going to change the scope ring game. These revolutionary rings feature an easily adjustable base for conversion from Weaver to Pic Rail compatibility and back again. The durable 6061 aluminum construction will last through all your hunts and competitions, featuring 4 offset screws for easy on-the-go adjustments. Rings are available in 1", 30mm, and 34mm Low, Medium, and High to fit all your favorite optics.Features:Easily adjustable base;Durabe aluminum construction;4 offset screws for easy on the go adjustments