I’ve bought two batches of 5 holders from Chronos… around a tenner each buying them that way.
On the plus side the price is very competitive, they are hard and I have found no problems with the studs, but on the minus side they are dimensionally inconsistent – no excuses with modern production equipment.
I found that the tee for the clamp varied somewhat in depth meaning that the clamp lever pulled-up in different positions for holders in the batch – no big deal, but some were very tight on the clamp in the unlocked position – possibly my toolpost (Bison) is also inaccurate to drawing.
The most frustrating variation is the ‘height’ at the bottom of the tool-slot which is quite variable, leaving some 10mm shank tools above centre height when the holder is at it’s lowest possible position. Managed to overcome the problem by ‘mixing and matching” toolholders to tools. Also, at the lowest position I’ve found that the adjustment thimble is almost off the stud – had to make a few specials.
Guess that you pay your money and take your choice – good luck!.