The PTS Low Profile QD Sling Swivel - S is the improved version of the original PTS Low Profile QD Sling Swivel. The D loop on Type S swivel is moved a bit downward and slimmer in size to protrude less and take up less space. The D loop on type S for a hook type attachment and can withstand strong pulling forces in all directions. Made of a strong steel alloy, the swivel has been tested to withstand up to 300kg of load. The QD sling swivel also features a recessed button, a design feature first seen on the PTS ESP-M2, to eliminate the potential of accidental release.