I chose these jaws because I have a vice with 2 1/2 inch wide jaws and they have magnets which are a solid strip so I figured that they stick to my cast iron vise jaws much better than pads with 2 round magnets and I figured that since they cost a lot more than the other types they probably have better magnets. I noticed this but thought I'd give it a try. When trying to clamp the small gun in the vise I hit one of the pads VERY lightly and it fell out of the vise and as I tried to move the gun into different positions To clean it, the pads keep moving or fall off. This is VERY poor quality, waste of money.