I have a 35+ year old Lisle kit i bought as a kid. It's got wing nuts but there cast and i use the bar from the flare screw to tighten them on tuff lines. It works best in the field (in the car emergency work) I also have the complete master cool unit with the AN and a few other specialty blocks it works great but on the car can be a no go due to its length. I like that Eastwood unit but I'm getting to the point that i don't need to do that many flares like i did when i drove junkers around.