Starrett Telescoping Gage Set, Self-Centering with Two Arms - for Determining True Size of Holes, Slots, Recesses - 5/16" - 6" Range, 2-3/8" - 3-1/4" Handle Length - S579HZ

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About Starrett Telescoping Gage Set, Self-Centering With

Product Description The Starrett S579HZ set of six telescoping gauges measures 5/16 to 6" 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", 1-1/4 to 2-1/8", 2-1/8 to 3-1/2", and 3-1/2 to 6". Each gauge has two spring-tensioned telescoping plungers for uniform contact pressure. The self-centering handles are rigidly attached to contact plungers. Five handles measure 2-3/8" and one handle measures 3-1/4" 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? (6) piece telescoping gauge set Protective case From the Manufacturer 579 Series Telescoping Gages are for determining the true size of holes, slots and recesses up to 6". Tools must be slightly "rocked" in the hole being measured to ensure that the tool is on the proper diameter before it is locked and withdrawn. The final hole size is obtained by measuring over the gage contacts with a micrometer.