Universal Front and Rear Launch Sight Propulsion Tool $ 29.97 Product Information: It Differs From our Previous Viewing Tools and Most Other Tools on the Market in That, This is How he Grabs the Slides. The Tool Grabs "all 4 Sides" of the Slide Rail to Prevent the Slide Rail from Trying to Tilt the Rail While Applying the Thousands of Pounds of Force Required to Adjust or Remove the Sight. Like Most Other Tools on the Market, This Tool Does Not Require Additional Block Sets to "try" and Grab the Slides. The Tool is Made of 6061 Aluminum Billet The Push Block is Made of 4140 "Cromo" Steel, Which can Meet the Required Strength. All Materials are Grade 8