BLACKHAWK! s LOK-DOWN sling swivels are precision machined and assembled to exacting tolerances for maximum performance and quiet carry. Made entirely in the USA from premium steel, LOK-DOWN swivels utilize a positive locking mechanism designed to keep the swivel attached to your gun until you remove it. The threaded lock-down plunger with knurled, all-steel plunger knob allows quick attachment to BLACKHAWK! and other standard swivel studs. Available in 1 and 1 loop sizes. Precision Manufactured in the USA. Threaded Lock-Down Plunger with knurled, all-steel plunger knob for maximum performance. All steel construction for ultimate ruggedness and durability. Finished to match fine Blued or Stainless Firearms. LOK-DOWN Swivel Set. Positivelocking mechanism.