About This Product
This ER-40 square collet block is a workhorse for anyone running a CNC lathe, milling machine, or engraving setup.

It's made from high-quality carbon steel that's hardened and ground to tight tolerances – we're talking flatness, parallelism, and squareness within 0.

0005 inch, so you know your workholding is dead-on accurate.

The square design makes it super easy to mount in a vise or fixture, and it's perfect for boring, milling, drilling, tapping, and even cross-hole drilling at angles like 60, 90, or 120 degrees.

Simple installation, holds up to frequent use without wearing out, and the elastic performance is excellent for gripping tools or workpieces securely.

Built tough, stable, and practical.

If you're doing any kind of precision machining, this collet block saves you time and gives you repeatable results.

Comes as one ER-40 square collet chuck – ready to bolt on and get to work.

