This Jaras tool was developed in conjunction with his upright hammer installer for holding the action in place to prevent tipping. Two units can be used on either end of the action, but only one is really necessary. The holder can be clamped to a table for added stability. Width of the holder should accommodate any type of action bracket, while the length is fully adjustable with 4 clamp positions on one end and a threaded screw assembly in front. Tool is made of aluminum and stainless steel, measures 10-1/2" long, weight 15 oz. Will last a lifetime.