Genera PROTO®️ Industrial Tools, part of Stanley Black & Decker's Industrial & Automotive division manufactures, markets and sells industrial hand tools to professionals worldwide. Pros who work the most demanding jobs, demand the most from their tools. Which is why every day, all over the globe, millions of workers reach for PROTO®️ Industrial Tools. Our tools tackle heavy-duty industrial applications, like auto, steel and airplane manufacturing plants, chemical factories, refineries; and transportation, fleet, truck and transit maintenance facilities, and more. In fact, PROTO®️ branded industrial tools are some of the most durable tools available – exceeding ASME standards. Their design and product features reflect the direct knowledge and experience of professionals. Developed according to strict ergonomic standards, PROTO®️ Tools offer special advantages such as enhanced shock absorption and reduced slip, as well as unique designs that improve efficiency, productivity and are easy to use. - Steel feeler gauge sets are used to measure gap widths by inserting the gauge into a gap. - They can also be used as high-precision, durable shims. - They are commonly used by engineers, machinists, and in light and heavy production, automotive, and woodworking applications. Blade Length / 3 in Blade Material / Steel Blade Style / Straight Blade Dimension Type / Inch Maximum Thickness - Inch / 0.040 in Minimum Thickness - Inch / 0.0015 in Number of Feeler Blades / 25 Thickness Range / 0.0015 in to 0.04 in Blade Width / 1/2 in Color / Silver Holder Material / Steel Included Blades / 0.0015 in, 0.002 in, 0.003 in, 0.004 in, 0.005 in, 0.006 in, 0.007 in, 0.008 in, 0.009 in, 0.01 in, 0.011 in, 0.012 in, 0.013 in, 0.014 in, 0.015 in, 0.016 in, 0.017 in, 0.018 in, 0.02 in, 0.022 in, 0.025 in, 0.03 in, 0.032 in, 0.035 in, 0.04 in Locking Device / Yes Markings / Inch with Metric Equivalent