VERY100 Flashlight Moun 45 Degree Side 1" 25.4mm Ring Offset QD Package Include: 1 x Offset Mount Material: High Pressure Steel; Rail Size( mm ): 21mm; Mount Dia: 25.4mm diameter Designed to mount flashlight or laser on hand pistols, rifles and shotguns Note: Please enaure the mount fit your gun before purchasing it 20mm Rail Picatinny.