Use to set and measure spark plug gaps plus other ignition clearances from 0.010 to 0.045_ (0.254 to 1.143mm). Six wire gauges check spark plug gaps and 12 straight blades check other clearances. It includes a double-ended electrode tool for easy adjustments. Blade Lengths: 3-5/16” long

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov