Stable Mount Design &Not Damage Rail:Just twist on/off the rail clamp screw nut via wrench to mount the base bar on rail . Once tightened they have not shaken loose .won't damage your rail. Screw is't touched rail and will not won't damage your rail
45 Degree Offset Mounts: The 45 degree offset with great low profile design can be placed at both a good angle and drop point and allows the attachment of lasers, red dot sights flashlight or other tactical offset.
Fits 21mm Picatinny Rail System: The offset rail mount fits on standard 21mm picatinny rail.
Universal-size Rail : 4-slot rails with matched screws and 1 Pcs wrench, perfect for customizing hunting! Such As Lasers, Flashlights.
Durable but Lightweight Material Aircraft Aluminum: Precision machined out of solid structure aircraft aluminum alloy and high strength steel in black matte coating anodizing finish with shiney.