Utg swivel adaptor key-mod accepts qd swivels FEATURES -Precision machined from aircraft grade aluminum with hard anodizing matte black finish-Innovative compact, lightweight, super low profile Keymod base Keymod nut for tight fit & max strengthlocking strength-Compatible with standard Keymod slots on Keymod rails to allow flexible sling attachment without additionalPicatinny conversion-Accepts any quick detach sling swivel with 0.37 diameter swivel stud-Simple & friendly installation - No gunsmith required-Package complete with installation screws & tools