Precision Universal Bevel Vernier Protractors with fine adjustment are designed for precision measuring and for laying out angles. The protractor is one of the most valuable and useful tools for the kit of every good toolmaker, inspector or machinist. FEATURES: The protractor is one of the most valuable and useful tools for the kit of every good toolmaker, inspector or machinist. Available with hardened 7" (175mm) or 12" (300mm) blades which can be rotated to the desired angle and adjusted to the desired length. Both the dial and the blade can be locked independently. An acute angle attachment is available. Flush surfaces on the base permits use on height gages. One side of the tool is flat so it can be laid on paper or on the work. Satin chrome finish on all reading surfaces - eliminates glare and resists rust. Sharp, machine-divided graduations. Machine-divided graduations read to 5 minutes (1/12 of a degree) and accuracy is finer than can be read. The most convenient, ultra-sensitive fine adjustment for precision setting.