a full extension ball bearing drawer slide assembly comprised of a fixed member attached to a cabinet piece , a middle member slidingly engaged with the fixed member with a set of linear bearings , a drawer member attached to a drawer piece slidingly engaged with the middle member via a second set of linear bearings , and a drawer retainer mechanism attached to the drawer member and in adjustable contact with the drawer member . the drawer retainer mechanism is comprised of a frame attached to the drawer member , a housing seated in the frame , a detent fitted in the frame and biased by a helical spring adjacent a post . the post has a threaded section engaged with a threaded hole in the frame . the detent , biased by the helical spring on the post , is forced towards the housing by a raised indention in a race of the fixed member .