Bravo Company manufacturing has gained quite a cult like following due to the fact that BCM takes quality control to a new level. BCM is known for strict tolerances and extremely high quality control to ensure the products they make can be trusted in the field under any circumstance. This particular part is a QD Stainless Steel Sling Swivel. It attaches to any QD style interface and is made from high quality steel. It features 4 chrome stainless steel ball bearings and a durable black oxide finish.