3/4"and 5/8" frequently. I use loose different things when splicing, but still having the nesting fids is a life saver. I've lost fids when they were loose in the truck. People have used them as pry bars and bent them. Nice to know everything is in one place when you need it.Not me. But I see no reason why you could not do it. You must be splicing some really big stuff?











