Blackpowder Products Hush Stalker II 1 1/4-Inch Sling Swivels, Black HUSH STALKER II QD swivels are extremely strong and durable. In fact, they have been independently proven to be stronger than most steel swivels on the market and the new QD swivel is 25% stronger than the original design. Plus, the low profile, flat swivel design prevents direct contact with the stock thereby keeping it scratch-free. And, unlike metal swivels, the polymer material will not squeak, rattle or rust. Now, sling removal is even faster and simpler with the HUSH STALKER II QD design.