This Graco Adjustable Length, Height, Angle Buttplate Auto Shotguns is for semi-automatic shotguns. The "length of pull" will adjust in or out 1-1/8" and the pad plate will move up or down 1-1/2", and can rotate to any comfortable position "toe in" or "toe out". A positive locking system will hold the adjustments in place without slipping. When unit is closed it will add 9/16" to the stock length.