Features: Micrometers are incredibly precise measuring tools used to accurately measure a variety of materials. The high precision of the micrometers offers machinists a versatile tool for creating high-quality final products. Useful for measuring groove depth. Resolution: 0.001mm/0.00005". IP54 protection level, Waterproof, and Dust-resistant. Large LCD; three keys. Spherical measuring end. Meet DIN40050/IEC529. Metric or inch micrometer heads. Friction thimble type. Other available types: Ratchet stop, and ratchet friction thimble. Base Length 63mm/2.5" Order No. Range Accuracy 108-0001 0-1”/0-25mm 0.004mm 108-0002 0-2”/0-50mm 0.004mm 108-0004 0-4”/0-100mm 0.005mm 108-0006 0-6”/0-150mm 0.005mm 108-0008 0-8”/0-200mm 0.006mm 108-0012 0-12”/0-300mm 0.007mm Base Length 101.5mm/4" Order No. Range Accuracy 108-0101 0-1”/0-25mm 0.004mm 108-0102 0-2”/0-50mm 0.004mm 108-0104 0-4”/0-100mm 0.005mm 108-0106 0-6”/0-150mm 0.005mm 108-0108 0-8”/0-200mm 0.006mm 108-0112 0-12”/0-300mm 0.007mm