Description: Raise flat rail line or sight by 1/2 inch. 1/2 inches (5 Picatinny rail slots) in length with a picatinny standard rail mount. Will accommodate Picatinny or Weaver standard red dots, scopes, and other optics. Locks securely in place with quick release lock.Adjustable locking tension. Fit standard 20mm picatinny rails. Specification: Weight:3 oz Rail Type:Picatinny/Weaver No. of Rails:1 Length:2.35 inch Width:1.3 inch Height:0.6 inch Made in PRC Package Includes: 1 Piece Rail Set System 1 Piece Hex Screws