Powerbuilt 648394 25 Blade Tune-Up Gauge All-in-one gauge for setting spark plug gaps, checking valve tappet clearances, adjusting points, etc. Includes steel Feeler gauges from .0015" Thru .030" Built to exceed tool standards Made from quality materials Durable and long lasting A great all-in -one tune up gauge Set spark plug gaps, checking valve tappet clearances, adjusting points and more Includes steel feeler gauges from .0015 inch through .030 inch Includes non-magnetic brass feeler gauges from .006 inch through .016 inch Includes wire gauges from .0125 inch through .045 inch