Device for securing a string ladder to the bottom rail of a horizontal blind assembly

A button for securing a string ladder to a bottom rail in a horizontal blind assembly includes a base plate with a central hole and a tubular stem extending upwardly from the base in axial alignment with the central hole for passage of strands of the string ladder therethrough. Arcuate wall segments spaced radially outboard of the central tubular stem have a top beveled edge and longitudinal compression ribs to promote insertion and snug-fitted captured receipt within a countersunk bore in the underside of the bottom rail in order to fasten the button to the bottom rail. Opposing teeth spaced between the arcuate wall segments provide slots for passage and wedged grasping of the ladder strands when the button is fastened to the bottom rail.