10 mm Jam Nut Valve Adjustment Tool by Powerbuilt

This tool makes adjusting valves easier on engines with a 10 mm jam nut and slotted valve adjusting stud. First, it’s designed with a view window to see the screwdriver blade position and engage it with the valve stud more easily. Then the unique all-in-one design positively tightens the jam nut while preventing stud rotation.

• Makes adjusting valves easier
• Unique all-in-one design positively tightens jam nut while preventing stud movement
• 7-1/2 in. handle provides necessary torque for loosening jam nut
• View window shows screwdriver blade position for easier engagement