The GG&G Heavy Duty Quick Detach Angular Sling Swivel has a large recessed CNC machined QD release button with grooves to help with finger or thumb placement when using the quick detach. The sling swivel is machined from solid billet and finished with a manganese phosphated matte black finish per mil-spec. The heavy Duty QD sling swivel will accommodate webbing up to 1 1/4". The heavy duty sling retention is angular shaped to accommodate HK style quick clips or mash hooks in the optimum position. Made in the USA with lifetime warranty.