GrovTec Twist Lock Push Button Sling Swivel Set With Bases may look like ordinary push-button swivels, but they don't act like them. These swivels use Grov-tec's patented design and are only named a push button swivel for its' general appearance. What makes these swivels unique is that they operate with a lift-twist motion for superior security. The body of the swivel locks around a loop to eliminate any unwanted opening.Features1" loopsBlack-oxide finishPatented lift-twist design