This 6-piece telescoping gauge set is a handy tool for anyone who needs to quickly and accurately measure the inside of holes, grooves, or slots—even ones up to 6 inches deep. Each gauge features double-action handles that automatically center themselves, so you get consistent results every time.
 
The contact tips are made from hardened, precision-ground steel and shaped with just the right curve to fit into tight spaces. A built-in spring keeps the tension steady, giving you uniform pressure while measuring. Just lock it in place and use a micrometer or caliper to take the reading—super simple.
 
Made from high-quality tool steel, these gauges are tough, wear-resistant, and built to last. Whether you’re in a workshop or out on a job site, they’re reliable and easy to use.
 
What’s Included:
6 telescoping gauges 
Measuring range: 8mm to 150mm
Accuracy: 0.1mm
Comes with knurled locking knobs for secure use
Ideal for checking internal diameters quickly and accurately
A solid, dependable set for anyone working with precision parts!
 
 
 
Range
Overall Length
Depth
 
5/16" - 1/2" (8 mm to 12.7mm)
4-3/8"
4"
 
1/2"- 3/4" (12.7mm to 19mm)
4-3/8"
4"
 
3/4" - 1-1/4" (19mm to 32mm)
4-3/8"
4"
 
1-1/4" - 2-1/8" (32mm to 54mm)
5-7/8"
5"
 
2-1/8" - 3-1/2" (54mm to 90mm)
5-7/8"
5"
 
3-1/2" - 6" (90mm to 150mm)
5-7/8"
5"