the other side of the cylinder bolt lock to prevent the securing key mechanism from being pushed out of the cylinder bolt lock one of the combination tumblers of the cylinder bolt lock will fall into an opened slot of the key thus securing the key and fixing it in a position out of the proper combination of the cylinder bolt lock thus preventing the cylinder from turning the foregoing can be accomplished in several ways accordingly two key mechanisms are proposed herein consisting of several moving components which are coupled together the key mechanism 1 comprises ten moving components and three springs where all the components are mounted on a mounting bracket the first key mechanism includes the combination of the original key to unlock the cylinder bolt lock fig6 and 7 these figures show how the butt end 5 of the key is locked by the t latch 7 that has not been pressed down the bolt driver 9 cannot be moved to form a slot because it is locked with the pin 4 which in this position is at the limit of the bolt driver slot see partial view preventing the bolt driver 9 from moving backwards fig8 shows the key partially inserted into the lock 2 upon inserting the key blade 3 in the cylinder bolt lock 2 as shown in fig9 it strikes with the butt end 5 of the key mechanism in this position the.