Include the cat's eye unlock tool sleeve, handle, press the pawl and wire rope, the handle is installed on the sleeve, wire rope through the sleeve, pulley firmware connected to the transmission rod, transmission rod is composed of two sliding rod, transmission rod through the press pulley firmware and connect ratchet. The pulley firmware with the pulley. Through the adoption of steel wire rope, sheave, pulley firmware and driving rod drive mechanism, the ratchet drive pressure reciprocating motion. Will pressure the cat's eye unlock tool from the cat's eye placement door, quickly open the locked door. Many experts advise before the lock to lock "nest". Get the second pin straight, and then in turn several curved above, then, under the condition of the spanner without power works, push pin lock. Then quickly put it out, turn the wrench with it in the upper portion of the lock. In this way, you may just broke through one or two marbles. Pick is the principle of soft hard cannot pick, pick is not soft not hard. In the process of picking marbles, pay attention to whether feel billiard deformity billiard or ordinary marbles. If billiard very gentle upward, until reach the designated position, it is common marbles; If marbles picked when suddenly feel loose, and the other hand also has the sudden move feeling, it is deformed marbles, and it is the deformation of type glass marbles; If is not very soft, when the marbles up feel stuck, but also can move up, at the same time have a snap snap, it is the deformation of helical marbles.