A lifter plate (20, 22), comprising: a lifter plate body including a first side wall and a second side wall configured to receive a vehicle window therebetween; a window holding member positionable in a locking position to prevent the withdrawal of the vehicle window from between the first and second side walls (66, 68); a locking member positioned to prevent the movement of the window holding member out of the locking position in the event of a force urging the withdrawal of the vehicle window from between first and second side walls (66, 68); and a biasing member having a resistance to flexion positioned to bias the window holding member towards the locking position, and wherein the window holding member is movable against the biasing member out of the locking position by the window during insertion of the window between the first and second side walls (66, 68), wherein the window holding member is a window pass-through member configured to pass through a locking aperture of the vehicle window and wherein the window pass-through member has a connected end and a free end, wherein the connected end is connected to the first side wall; wherein the locking member includes a free end vertical limit surface that is positioned to engage the free end of the window pass-through member to limit upward movement of the free end, and characterized in that the locking member further includes: a first side wall horizontal limit surface configured to engage a corresponding horizontal limit surface of the window pass-through member to limit horizontal movement of the window pass-through member in the event of an upward force on a vehicle window held in the lifter plate (20, 22). a lifter plate body including a first side wall and a second side wall configured to receive a vehicle window therebetween; a window holding member positionable in a locking position to prevent the withdrawal of the vehicle window from between the first and second side walls (66, 68); a locking member positioned to prevent the movement of the window holding member out of the locking position in the event of a force urging the withdrawal of the vehicle window from between first and second side walls (66, 68); and a biasing member having a resistance to flexion positioned to bias the window holding member towards the locking position, and wherein the window holding member is movable against the biasing member out of the locking position by the window during insertion of the window between the first and second side walls (66, 68), wherein the window holding member is a window pass-through member configured to pass through a locking aperture of the vehicle window and wherein the window pass-through member has a connected end and a free end, wherein the connected end is connected to the first side wall; wherein the locking member includes a free end vertical limit surface that is positioned to engage the free end of the window pass-through member to limit upward movement of the free end, and characterized in that the locking member further includes: a first side wall horizontal limit surface configured to engage a corresponding horizontal limit surface of the window pass-through member to limit horizontal movement of the window pass-through member in the event of an upward force on a vehicle window held in the lifter plate (20, 22).