by raimundo » 15 Jan 2006 10:39
there is a common style of key in knob lock that has the face of the knob concave, this style is called the tulip, any wrench called tulip would probably be one that has a 120 degree bend rather than a 90 degree bend, there are also some that have a 90 degree bend and a couple more bends to correct enough to get into the tulip concavity, the designers were challenged and did not truly understand that all the extra bends are unnecessary. A 45 degree bend and another 45 degree bend half an inch down the shaft is enough. there are other reasons for deep reach or short handle wrenches, such as doorframe or knob interferance, or keyhole armor that necessitate special designs of wrenchs. You should get some spring steel stock and learn to make a wrench when you encounter a special circumstance that you need to work around.