It is for the spindle of a Colchester bantam, reducing it from MT4 to MT3 and needs to be open endedto allow a drawbar to pass through. My current one is from RDG but I've discovered it isn't concentric so I'm loathed to chance RDG/ARC/Chronos. Bison seem to do them (**LINK**) but I'd rather order from the UK. I've tried cromwell, cutwel and MSCDirect and they don't have them on their websites, any idea who might sell a branded one?

Thanks for the rota grip link. Definitely MT4.

MadMike – the spindle is true and the OD of an MT4 dead centre i have also runs true when in the spindle. I even went as far as wrapping the MT4 dead centre shank with 2000 grit wet and dry and rotated it in the spindle bore to make sure there were no high spots.

Keton – I've bought from all 3 of those I named, and will continue to do so. The vast majority of purchases have met my expectations and in general that's what i have come to expect. I have also had cause to return a product each. In two of those cases (one of which was ARC – embarrassingly wonky T-nut and stud) the product should never have passed a basic visual inspection, the other (not ARC) would have been picked up if it had been checked for square at the factory (a center finding square, so it should have been). This was one of those rare occasions where i was prepared to pay a premium price for a branded product to give myself the best chance of getting something spot on first time. I didn't mean to cause offence, but i can only speak from my own experience. I've not bought from MSCDirect and my have wrongly assumed they sold branded equipment as well as unbranded import.