4-Piece Full Ball Telescoping Gauge Set 0.125–0.5 Inch

4-Piece Full Ball Telescoping Gauge Set – Precision Bore Measurement

Take the guesswork out of internal bore measurements with this professional-grade 4-piece Full Ball Telescoping Gauge Set. Covering a measurement range of 0.125 to 0.5 inches, these stainless steel gauges are an essential addition to any machinist's, woodworker's, or mechanical technician's toolbox. Built for accuracy and durability, this set helps you quickly capture precise internal dimensions of holes, cylinders, and bores — ready to be transferred to your micrometer for a final reading.

Made in Mainland China.

Key Features

• Full Ball Type Design: The full ball contact heads ensure maximum surface contact for consistent, repeatable measurements.
• Wide Measurement Range: Covers 0.125" to 0.5" — suitable for a broad variety of bore sizes in one compact set.
• Stainless Steel Construction: Corrosion-resistant, hardened stainless steel body ensures long-lasting precision and durability in workshop environments.
• 4-Piece Set: Four gauges of varying sizes so you always have the right tool for the job — no need to buy individual gauges separately.
• Easy to Use: Compress the ball end, insert into the bore, release to expand, then lock and withdraw to transfer the measurement — simple and reliable workflow.
• Woodworking & Machining Ready: Ideal for DIY woodworking, automotive engine work, metalworking, and general engineering tasks.

Specifications

• Product Type: Full Ball Telescoping Gauge Set
• Material: Stainless Steel
• Measurement Range: 0.125" – 0.5" (approx. 3.175 mm – 12.7 mm)
• Package Contents: 4 pcs / set
• Country of Origin: Mainland China

Note: Please allow 1–3 mm differences due to manual measurement. Colors may vary slightly from screen to screen.

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Frequently Asked Questions

Q: What is a full ball telescoping gauge used for?

A: A full ball telescoping gauge is used to measure the internal diameter of bores, holes, and cylinders. You compress the ball head, insert it into the bore, release it to expand against the walls, lock it in place, and then withdraw it. The locked measurement is then read using an external micrometer for a precise internal dimension.

Q: What range of bore sizes does this 4-piece set cover?

A: This set covers a measurement range of 0.125 to 0.5 inches (approximately 3.175 mm to 12.7 mm), with four individual gauges of varying sizes to handle different bore diameters within that range.

Q: What materials are these telescoping gauges made from?

A: These telescoping gauges are constructed from corrosion-resistant stainless steel, making them durable and reliable for repeated use in workshop, woodworking, and machining environments.

Q: Do I need any other tools to use these gauges?

A: Yes, to obtain a final measurement reading, you will need an external micrometer. The telescoping gauge captures and locks the internal dimension, which you then measure across the ball heads with your micrometer for an accurate reading.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.