An advanced design micrometer series featuring superior quality, perfect balance and full-finish tapered frame. Economical in price, these tools receive special care in design and workmanship to ensure high precision and long life. Fowler Micrometers meet or exceed Federal specifications for accuracy. The perfect micrometer for all around measuring. Satin chrome finish forged steel frame is tapered for hard to get at locations Sleeve and thimble have microfine black graduations contrasted with satin chrome Anvil and spindle carefully hardened and precision ground, with microlapped ends Ultra-positive locking clamp to ensure reliable measurement setting at all times Smooth action friction style thimbles for exact and repetitive settings Paralax free thimble Wear-resistant carbide faces on anvil and spindle precision ground and microlapped Diameter of measuring faces: 6.5mm Graduation: .001mm Accuracy: ± .004mm A spanner wrench is included with each tool for quick and easy zero adjustment Includes case Includes standard for 25-50mm sizes