The Starrett S579GZ set of four telescoping gauges measures 5/16 to 2-1/8" holes, slots, and recesses in woodworking, metalworking, machining, layout, and pattern-making applications. The four gauges measure from 5/16 to 1/2", 1/2 to 3/4", 3/4 to 1-1/4", and 1-1/4 to 2-1/8". Each gauge has two spring-tensioned telescoping plungers for uniform contact pressure. The self-centering handles are rigidly attached to contact plungers. The handles measure 2-3/8" in length. A lock at the end of the handle secures the gauge width for measurement with a micrometer (sold separately). The gauge set comes in a protective case for storage.

The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company, founded in 1880, is headquartered in Athol, MA.

What's in the Box?

• (4) piece telescoping gauge set
• Protective case