restraint bar 92 the end 100 of plunger 66 may also include a recessed portion 94 for receiving the other end of the restraint bar 92 in some embodiments an end of the restraint bar 92 may be attached within the recessed portion 94 restraint bar 92 may include a geometric shape such as for example a square cross or hexagonal cross configuration each one of the recessed portions 90 and 94 may also be configured to receive the cross sectional configuration of the restraint bar 92 in mating relationship hence an assembly of the aforementioned cross sectional configurations of the restraint bar 92 disposed within recessed portions 90 and 94 may prevent the pin casing 62 from rotating or turning with respect to the plunger 66 this may help ensure proper alignment of the pin 26 such as the upper wedge 36 configuration with respect to another contact surface hence when the pin 26 is retained in place for example via a locking member urged against the upper wedge 36 of the pin 26 the plunger 66 may be enabled to become biased against the spring stack 64 the spring stack 64 will in turn become biased against the interior region 102 of pin casing 62 to create a force between the upper wedge 36 and the locking.