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.Specifications and Features: Size: 30mm Ring Height: Low Center Scope Height: 0.87" Base to bottom Height: 0.28" Cap Screw Torque: 15-18 In-Lbs Weight: 2.81 oz