I have been using a larger home made hot wire cutter for years, but need something which is more accurate, so I decided to make one.I soon changed my mind, when I see the price, I realized I could not build it cheaper, so the order was placed. There are no English instruction, just some pictures.A large set square was placed on the base, and the arm adjusted in both planes to get the wire set at 90 degrees, very pleased with the purchase.Delivery was quick as well.