SAHS03 push button quick detach sling swivel has an aluminum knurled stop of 28mm diameter with quick detach push button 1 5/8" sling swivel loop and stud. The sling swivel loop and stud are made of carbon steel and the stud has ball bearing to allow smooth 360degree free rotating. The sling swivel stop will fit onto both Anschutz and Winchester style UIT t slot rails with its two-way rectangular top. It provides optimized hand position between the stock fore-end and sling. Finish & color: Anodized matte silver and black. Weight: 1.6oz.