16 and releasably fills the clearance space 20 between the intermediate rail 16 and the drawer rail 18 when in the 34 locked 34 position fig3 the lock fills the clearance space 20 and prevents cocking of the drawer rail 18 when in the 34 unlocked 34 position fig4 and 5 the lock is clear of the space 20 permitting relative cocking of the drawer rail 18 with respect to the intermediate rail 16 with the exception of the lift out lock 12 and the means of supporting this lock the drawer rail 10 is generally well known to those having ordinary skill in the art one such slide is the above identified knape amp vogt model 1428 three part slide briefly summarizing the slide includes a cabinet rail 14 an intermediate rail 16 and a drawer rail 18 each of the rails is generally c shaped in cross section including a web and a pair of flanges extending outwardly therefrom in a common direction the flanges cooperate with balls rollers or other rotatable means to slidably interfit the rails for relative longitudinal movement in the knape amp vogt slide balls are interfitted between the flanges on the cabinet and intermediate rails to slidably interfit these two members and rollers 22 and 24 are rotatably supported on the intermediate rail 16 to support the drawer rail 18 relative longitudinal movement of the drawer rail 18 with respect to the intermediate rail 16 is limited in conventional fashion by stop means the drawer rail 18 includes an integral downwardly depending finger 26 and the intermediate rail 16 includes an integral tab 28 which engage one another when the drawer rail.