Custom Square Holder for Rotary Spin Fixture. Most likely made for a Harig Grind All or a Suburban Master Grind. I took photos of dimensions so please review them prior to purchasing to check fitment. Capacity was approximately .980" or 25mm width. Capacity height approximately 1 1/4". Capacity depth approximately 2.50". Most importantly, width from center to center of mounting holes is 2.250". Not sure what unit this was used on or application, possibly EDM. Construction is nice. Please review all photos to determine condition and identification. Item is sold as is with No Returns. Will be shipped via USPS Priority.