The UTG Pro MAX 1-inch Low 2-Piece Rings hold your scope close to the bore for a low, stable sight line on any Picatinny rail. The two-piece design clamps with a twist-lock cross-bolt and a heavy-duty steel locking plate for a secure, repeatable fit. Features: Two-piece scope rings for 1-inch tube diameter only (not 30mm) Low profile mounting height Picatinny rail compatible Aircraft-grade aluminum rings with heavy-duty steel locking plate Twist-lock cross-bolt clamping system 18mm ring width with interior protective tape Matched set Verify your scope uses a 1-inch main tube before ordering.