Material stainless steel and brass construction provide strength and durability for longterm use. Foldable design Foldable blade gauge for easy transport and compact storage, enhancing portability. 32 blades Includes 32 blades with dual inch and mm markings; size numbers are clearly etched for quick reading. Accurate calibration Designed for accurate calibration with a nonslip lock nut to keep readings stable during use. Use scenarios Automotive maintenance and engine work: measure gaps and clearances for valve lash, spark plug seats, and other components that require precise feeler gauge readings. Machine and metal fabrication: set tool heights, verify shim thickness, and check clearances during setup and assembly. Woodworking and general craftsmanship: confirm blade thickness and establish accurate gaps when aligning parts or configuring cutting tools. This feeler gauge set delivers strong material performance, reliable calibration, and portable usability for a range of precision measuring tasks.