Higoo 1 inch/25.4mm Low Profile Ring Mount, One Inch Flashlight Laser Riflescope Optics Rings, fit 20mm Picatinny Waver Rail Precision ,machined from aircraft-grade aluminum alloy with anodized black matte finish. Friendly Hex Screws, easily install and release. One Inch/25.4MM Ring Low Profile, fits Picatinny Waver Rail 2 Ring in One Package