Lot of 24 Industrial diamonds for dressing grinding wheels. Most are .375 diameter shank. 1 has 1/4-20 thread on it.
23 have a single diamond in it. 1 is a cluster diamond.
I was a precision form grinder for over 20 years and these were in my tool box after I retired.
1X2X3 block is for display only and is not for sale.
Contact me with any questions.