The Screw Tuner is a two way screw thread that will extend when turned one way, and contract when turned the opposite way. When clipped into position it will give the rest a locked position, however still allowing the user to fine tune a vertical adjustment by elevating or lowering the point of aim.  

KEY FEATURES

• Use Screw Tuner on SR01 to give the shooter fine tune adjustment on bench and a locked position. 
• Screw Tuner Only