I use the European terminal block for ejection charge connections. How they got this name, I don't know. Anyway, I liked the ones I bought from Radio Shack many moons ago. I recently bought a mega-pack from Amazon and they seem to be of lesser quality. The screws don't turn as smoothly. Worse, the screws have a sharp edge on the bottom that can easily cut through 20-22 ga ematch wires. Are there different levels of design/quality on these things? Or, is it just the natural progression to the lowest possible cost Chinese manufacturing, like everything else? Maybe I will switch to little, green terminal blocks like those on altimeters, but I am always afraid they will melt during ejection blasts.