Use this RS PRO feeler gauge set to measure the gap between two objects in very close proximity to each other. It's designed for spaces that are too small for a normal measuring tape. It's frequently used in engineering to determine the clearance between machine parts.
The feelers are made from strong brass for improved measuring accuracy. They're also corrosion-resistant so won't rust if the tools are exposed to moisture. This set is supplied in a vinyl case for protection and safe storage when it's not in use. The case also makes it easy to pop the set into your toolbox.
A feeler gauge unit such as this one is also handy for home mechanics, for example for measuring odd-sized gaps in car engines. It consists of 20 separate blades of different thicknesses, which will allow you to measure gaps ranging from 0.001 mm to 0.762 mm wide.

• Twenty blades
• Brass feeler material
• Minimum gap measurement of 0.001 mm
• Maximum gap measurement of 0.762 mm