Bi-directional Design to Offer Needed Offset in Diverse Applications Robust and User Friendly Ergonomic Quick Detach/Lock Lever Fully Adjustable to Fit on Any Picatinny Rail Clever Posi-lock Crossbar Design and Spring Tension Controlled Locking Plate with Steel Insert Guarantees Most Secured Installation Tight Tolerance Control and Repeatable Positive Locking for Optimal Re-zero High Quality Synthetic Tape Applied on Rings Internal Surface for Scope and Mount Protection Adjustable Quick Detach Lever Lock System Ring Top Picatinny Rail Material: Aluminum/Steel Weight: 6.7 oz Pieces: 1 Rail Type: Picatinny Profile Level: High Ring Diameter: 1" Ring Width: 18/18 mm A: 1" B: 18/18mm C: 20mm D: 100mm E: 35mm