Quick Detach Sling Swivel Mount Heavy Duty Push Button Set Picatinny Mount 20mm Durable all metal construction, with black anodized matte finish 1.25" push button QR sling loop Compatible with standard 20mm Weaver/Picatinny rails Quick detach push up swivel, easy to attach Dim: 1.2 inch x 1.88 inch x 0.7 inch , W: 1.5 oz