Features and Benefits:

• For use on a wide variety of cars with 10mm, 12mm, 13mm, 1/2" and 9/16" jam nut valve adjustment screws
• Allows technician to see the position of the screwdriver blade holding the adjustment screw as the jam nut is tightened
• Allows for quicker valve adjustment time because technicians can hold adjustment screw exactly where they want it
• Unique handle pivots from side to side, so the window is always visible
• Comfortable grip handle
• Made of heat treated chrome vanadium steel