A lever assembly for mounting to a removable plug-in module for selectively engaging a lip of a rack for effecting an injection of the plug-in module into the rack, the lever assembly comprising: an elongate lever handle having a rearward portion and a forward portion extending along a lever handle longitudinal axis; the lever handle having a lower interior surface; an elastic bias element mounted to the lever handle; a pawl pivotally mounted to the lever handle; characterized in that the rearward portion of the lever handle has a first pivot axis and a second pivot axis that are both fixed relative to the lever handle; wherein the second pivot axis is spaced from the first pivot axis and disposed downward farther from the lower interior surface than the first pivot axis; a pivot arm is pivotally mounted to the lever handle for rotation relative to the lever handle about the first pivot axis; the pivot arm having a forward free end abutting the elastic bias element; the pawl is pivotally mounted to the lever handle for rotation relative to the lever handle about the second pivot axis; the pawl having a rearward tip and a forward bearing surface; a pivot axle mounts the pawl to the lever handle for rotation about the second pivot axis; the pivot arm is disposed operatively between the pawl and the elastic bias element such that the pawl is spaced from the elastic bias element; and the pivot arm and the pawl are configured such that, in response to a force being applied to the pivot arm's forward free end, urging the pivot arm to rotate away from the lower interior surface, while the pawl abuts the pivot arm, the force is transmitted to the pawl so that the pawl's rearward tip is urged to rotate upward. an elongate lever handle having a rearward portion and a forward portion extending along a lever handle longitudinal axis; the lever handle having a lower interior surface; an elastic bias element mounted to the lever handle; a pawl pivotally mounted to the lever handle; characterized in that the rearward portion of the lever handle has a first pivot axis and a second pivot axis that are both fixed relative to the lever handle; wherein the second pivot axis is spaced from the first pivot axis and disposed downward farther from the lower interior surface than the first pivot axis; a pivot arm is pivotally mounted to the lever handle for rotation relative to the lever handle about the first pivot axis; the pivot arm having a forward free end abutting the elastic bias element; the pawl is pivotally mounted to the lever handle for rotation relative to the lever handle about the second pivot axis; the pawl having a rearward tip and a forward bearing surface; a pivot axle mounts the pawl to the lever handle for rotation about the second pivot axis; the pivot arm is disposed operatively between the pawl and the elastic bias element such that the pawl is spaced from the elastic bias element; and the pivot arm and the pawl are configured such that, in response to a force being applied to the pivot arm's forward free end, urging the pivot arm to rotate away from the lower interior surface, while the pawl abuts the pivot arm, the force is transmitted to the pawl so that the pawl's rearward tip is urged to rotate upward.