Abstract: A slide for vehicle seats includes a generally U-shaped female section having two flanges respectively extending to flange returns that confront one another. Also included is a generally U-shaped male section also having two flanges respectively extending to flange returns that are oppositely directed from one another, the flange returns of the male section are inserted under the flange returns of the female section. At least one retention unit is attached to the female section and extends between the flanges of the male section. Pointed teeth extend from edges of the retention unit and are directed toward confronting adjacent planar surfaces of the male section flanges. Tips of the teeth are made of a material harder than that of the male section to allow penetration of the teeth into the planar surfaces of the male section flanges thereby anchoring the teeth therein, in response to deformed displacement of the male section flanges toward the teeth.