This width adjustable floor guide works for both pre-grooved and non-grooved door | Fits non-grooved door thick from 1 to 1-3/8 inch,please check the space between door and wall | They are small guides with 1-1/8" front arm height,we suggest a higher wall mounting for excess door bottom space | Please kindly refer to the measurement on the picture before purchasing | Made out of quality steel.Durable and reliable.Powder-coated black finish