I am afraid I have become addicted to eBay. It's not my fault. I could not pass up a 5C collet chuck. And once I mounted it on the lathe (10" Grizzly), I had to buy more 5C collets. BTW, the TIR for the chuck is ~0.0005". So, the last couple of days, I bought three hex 5C collets to go with the square collets I bought earlier this month. I don't buy complete sets - just as needed. The sets might be cheaper, but there are quite a few sizes I don't need right now. Sourced via eBay and Shars mostly. And I saw a nice [used] Mitutoyo 25mm micrometer (mech-digital) on the Ideal Precision Instruments website. These two orders were "firsts"...had not ordered from them before. Have a great day! Regards, Tim R.