Starrett 579B Telescoping Gage 1/2-3/4 Inch Range

The Starrett 579B Telescoping Gage is a precision inside measuring tool designed to accurately transfer internal measurements for reading with an outside micrometer or caliper. With a measuring range of 1/2" to 3/4" (12.7mm to 19.05mm), this gage is ideal for measuring bores, holes, slots, and other internal features with confidence and repeatability.

Starrett telescoping gages feature a hardened, ground, and lapped contact plunger that locks firmly in place with a smooth-action locking handle, ensuring measurements are held securely during transfer. The knurled handle provides a comfortable, non-slip grip for controlled use.

Key Features:

• Measuring range: 1/2" to 3/4" (12.7mm to 19.05mm)
• Hardened and ground telescoping contact for durability and accuracy
• Smooth friction lock secures the plunger at the measured dimension
• Knurled handle for secure, comfortable grip
• Designed for use with an outside micrometer or caliper for final reading
• Manufactured in the USA to Starrett's exacting quality standards

The Starrett 579B is a trusted choice for machinists, toolmakers, and quality control professionals requiring precise internal measurements in a compact, easy-to-use format. Part of the Starrett 579 series of telescoping gages, available in a range of sizes to cover most bore measurement needs.