This buckle keeps the length of a waistbelt fixed.
The nylon webbing used on our belts is made of backpack weight nylon and provides easy, quick adjustments (either loosen or tighten) while the belt is worn and with weight on the belt. This buckle is designed to work while under tension, however, when the belt is removed from the body the buckle frequently will slip out of adjustment. Some people find that slightly annoying. This pair of sliders that can be field adapted on one or both ends of the belt, so your adjustment is made semi-permanent.
The B501 is for 2" (50mm) webbing found on the B210 Unpadded belts, heavy-duty belts and some of the older “Black Belts.”
The B401 is for 1-½" (40mm) webbing found on newer Black Belts.
Note: may have either a black or, unlike the photos, a nickel (silver) finish.
Click on this “How To” page for instructions on how to attach a slider to a belt.