87Pcs/Set 1 Grade 0, Grade 1, Inspection Block Gauge Test Caliper Blocks, Measurement Instruments ,Versatile Applications

Measured Size Range: 0.5-100mm. Material: Made from high grade tool steel stress relief against distortion, precision ground and hardened. Application: Easy to use in precision clamping of parts indrilling boring, milling, prinding, assembly work, etc. Easy Storage: Set comes packed in a wooden case for easy storage, protection and transportation. Package: 87pcs parallel blocks.