This a very complete set of wire-block terminals and a square crimp plier that terminmate 8ga to 26ga(very thin) wires, such as are used in teminal blocks, screw-down terminals, and patch panels. I found these to be of good quality, and the wire cuttter-stripper is very sharp and works well. The actual crimper is a joy to operate and makes lovely square-cross-section terminmal crimps. I'm also using these to crimp regular multi-strand wires into the square ferrules, which I then instert into REGSee full review