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. Combining extension rods provide a wide measuring range. Supplied with a standard caliper gauge for zero setting. Carbide measuring faces. Diameter of extension rod: 22mm. Travel of micrometer head: 25mm. Resolution: 0.01mm (metric); 0.001" (inch). Accuracy: metric (3+n+L/50) ųm (n = number of rods, L = max. measuring length) Order No. Measuring Range Extension rods 107-2040 100-125mm Micrometer head 107-2041 100-500mm 25mm, 50mm, 100mm, 200mm 107-2042 100-900mm 25mm, 50mm, 100mm, 200mm, 400mm 107-2043 100-1300mm 25mm, 50mm, 100mm, 200mm, 400mm, 400mm 107-2044 100-1700mm 25mm, 50mm, 100mm, 200mm, 400mm, 400mm, 400mm 107-2045 100-2100mm 25mm, 50mm, 100mm, 200mm, 400mm, 400mm, 400mm, 400mm