How many times have you had to staple small parts that were slightly wrong because you had to adjust them? Well it happens to me. I have seen and tried these. Wow, that really is a third hand and I don't know how I managed without it. In art/craft welding you often have a small piece that is difficult to assemble, hold to fasten. The front clamp and rear ground strap are well designed and obviously invented by a welder. This solves many problems. I liked it so much that I also ordered a regular Locust (only $28) which has a V-shaped magnetic base. This is also very practical. Both as you know have 3.5 arms to fit.