AUTOOL&reg; 25.4mm-30mm QD Scope Mount with Quick Release Cam Locks Adjustable QD lever,auto lock. Fits 30mm /(25.4mm) adjustable diameter O-Ring Scope,suitable for 30mm/25.4mm (1") Tactical Flashlight & Laser Sight Tube Install on all 20mm Weaver Rail, Scope Rail & picatinny Rails Standarddesign for better eye relief position Made from aircraft grade 6061 aluminum alloy,Anodized black/sand matte finish