if you are not familiar with their use... the pouch is basically a loop of leather/poly laminate that is contoured to hold the speed loader, the sides are open, and the pouch is slipped under the belt, with the snap to the front... the speed loader is inserted cartridges down with 3 on each side of the belt... the sides are open, so when the pouch is unsnapped the thumb and bird finger grasp the speed loader as the index finger works the snap
we called them a Rogers six pack
I shot a SW M25 .45acp for a while, and was too cheap to invest in quality mag pouches... I used a simple necklace of 550 cord with a large cotter pin, spread enough, and with enough tension to hold 4-5 loaded clips (mine were from Ranch Products)... to reload I just pulled the bottom clip down and off