Easy Identification- Dual marked metric and imperial feeler gauges measuring range from 0.001inch to 0.04inch (0.03mm to 1mm), the numbers of size are etched into the feeler gauge for easy identification User Friendly- The edge of the feeler gauge set is steel and polished. It's full of bright metal texture specially treated, smooth and doesn't hurt your hand Foldable & Portable- Stainless steel feeler gauges can fold into a plated steel case with a thumbscrew, easy to carry, convenient to take and safe to store Quality Material- Tapered feeler gauge metric is made of high quality flexible #65 manganese steel, hardened and polished for long time and accurate usage Long Lasting- The feeler gauge imperial and metric is coated with vaseline. With this protection, the feeler gauge doesn't get rusty and easy to open. Blades: 32 Blades Material: #65 manganese steel Imperial Measurement: 0.001inch to 0.04inch Metric Measurement: 0.03mm to 1mm Package: 1 x Feeler Gauge