Safariland Springfield XD 9-mm, 40, 45 4-Inch Barrel 6378 ALS Concealment Paddle Holster (STX Black Finish) ALS (Automatic Locking System) secures weapon once holstered and easily released with thumb during draw Low-Ride level Comes with ergonomically design soft nylon paddle and optional fully adjustable belt slide Plain Black Finish ALSAutomatic Locking System secures weapon once holstered, it locks into place Slim and low profile design for improved concealment Simple straight draw once ALS is de-activated Formed, sturdy paddle design for comfort and easy on and off Fits 1.5" to 1.75" belt widths