100% Matte 45 Degree Offset Picatinny Rail MountSuper Lightweight Offset Side Rails with Great Low Profile Design! Allows the Attachment of Lasers, Flashlights, Red Dot Sights or Other Tactical Offset, the 45 Offset Design Creates More Mounting Versatility Eliminating Interference with Vertical Grips, Perfect for Amateurs and Professionals. Fits 21mm Picatinny Weaver Rail SystemThe Offset Rail Base Mounted On Standard 21mm Picatinny or Weaver Style Rail Platform, Ensure Mounting Tactical Accessory Seamlessly. Note: Our Offset Rails are Real 45 Degrees Angle Instead of 30 Degrees like other products on the market.: Offset 5 Slots Picatinny RailsWith 5 Slots Picatinny Rail, Allowing You Quickly Add On Any Standard Picatinny or Weaver Accessories, Such As Lasers, Flashlights, Red Dots Sight, Micro Red Dot, Microdot, Backup Sights, Scopes, Optics. Solid & DurablePrecision Machining of High Grade 6061 Aluminum Alloy In Black Matte Anodizing Finish + High Tensile Steel Screws, Weight: 1.06 oz/30 g, Durable & Lightweight Construction, High Quality, Don't Worry Wobble or Shake. Quick Release & Easy To InstallSimple 2 Built-in Locking Screws Design On the Side, Easy and Quick to Remove or Mount, It Can be Installed Left or Right. Note: Before install, Make Sure to Loosen these Screws, After Inserting Into the Picatinny System, Tighten the Two Screws with A Allen Wrench to Achieve Firm and Stable Effect.