I am a tool guy, I love to have and use my tools. Due to this I also prefer to have and use ones that I know will last. I have a few off brand pairs of vise grip style locking pliers and honestly none of them compare to the name brand Vice Grips. This is a large nice set that works very well for holding larger pieces together.
This is a large pair. The Top/Bottom of the C-clamp portion is about 3-1/2" wide. The top to bottom measurement of the C-clamp is 5-1/4" when closed and the mouth opens up to clamp down on something as large as 4" across. I use this pair when holding 1x2 pieces or steel and need to have a nice firm grip. The gripping tips have a swivel mechanism that works nicely to give more grip when in use by matching the angle of whatever you are clamping.
When Irwin bought the Vise Grip brand I was worried they might mess with them, that has not happened, these are just as solid and reliable as my pre-Irwin brand Vise-Grips. About the only difference is the additional Irwin logo on them now.
These can get hot enough to actually turn a little blue when I weld really close to where they are clamping, that's how hot they get! These are a very thick metal, very solid and secure and it's immediately apparent when you hold them. Compared to my others (including Craftsman) these are by far the best.
5 stars, these are solid, reliable and do last a lifetime. I've had my oldest set over 30 years now and they are just a dependable as the new ones.