Solid, one-piece aluminum mount with steel, pivot pin and swivel attaches to any Picatinny or Weaver-style accessory rail for instant sling attachment. Nylon tip set screw locks mount to rail. Quiet, rubber-coated swivel prevents metal-to-metal slap and eliminates sling wear at point of contact. Accepts slings up to 1A 1/4" wide. Mfg: Ergo Grips SPECS: Base - Aluminum. Swivel/Hardware - Steel. Matte black finish. 9/16" (1.4cm) long, 1A 1/4" (3.2cm) wide, 1-5/8" (4.1cm) high. Fits slings up to 1A 1/4" wide.