Simple to Install: Upgraded side clamp block design with 2 built-in clamp fixing screws, just twist on/off the rail clamp screw nut via wrench and mount the base bar on rail and won't damage your rail. Once tightened they have not shaken loose .
Super Multi-size Rail Pack: Pack Of 2: 4-4 slot rails,2 sets matched screws and 2 Pcs wrench, perfect for customizing hunting!
45 Degree Offset Picatinny Rail Mounts: The 45° offset 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, perfect attachment for hunting accessories.
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.