The new 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. – Offset 4 Screw – 1 30mm & 34mm Low Med High – 6061 Aluminum Construction – Proprietary Conversion For Weaver Or Pic Rail Compatability