SET INCLUDES: This feeler gauge set is composed of 12 heavy duty blades; Unlike other feelers, our set of blades is an offset feeler gauge set which is offset by 30 degrees; These blades are also 4 inches long so they are compact and easy to use 
WIDE RANGE: These go no go gauges have a wide range of measurements, so that you can be sure to get the correct calculation; Our automotive feeler gauge set measures from 0.008 inch (0.203 mm) to 0.26 inch (0.660 mm); Accurate feeler gauges 
MEASURES METRIC AND SAE: Our gap measurement tool is specially designed to not only display SAE measurements but also metric sizes; Each bent feeler gauge is laser etched with inches and millimeters, one right under the other, so they are easy to see 
DURABLE MATERIAL: No matter what materials you are working with, you do not have to worry about this tappet feeler gauge breaking while you work; Each of the 12 blades within this short feeler gauge set are composed of hardened and tempered steel 
EASY BLADE REMOVAL: This valve feeler gauge set features a thumb notch to loosen the hold, so that you can easily remove the size that you need; Then you can tighten the notch on this steel feeler gauge when the blades are back together