Krislon group manufactures and exports wood working tools. They offer hook rule. The hook rule is used by wood workers. It is available in any kind of graduations and in chrome finish. Use of the hook at the end of these rules facilitates measuring dimensions from the edge of the board. These rules have 4 different measurement i.E. 1 / 8", 1 / 16", 1 / 32" and 1 / 64". The length of the hook is adjustable for easy measurement.