An exercise machine includes a frame and a weight assembly with multiple plates moveably disposed along a vertical length of the frame. The exercise machine also includes a lifting member selectively engaged with the weight assembly, and the multiple plates each include at least one lift opening to receive the lifting member. The lifting member is oriented transverse to a plate length and to travel in a transverse direction with respect to the plate length. Further, the exercise machine includes a locking member associated with at least one plate of the multiple plates, and a selector having a first position and a second position. When the selector is in the first position, the locking member is interlocked with the lifting member. When the selector is in the second position, the locking member is disengaged from the lifting member.