THEY ARE QUALITY COLLETS SIGNED ON THE SHANK AND MARKED WITH THE RIVETT SIZE SYSTEM, THE STUBB'S WIRE GAUGE SYSTEM.
THIS SIZE SYSTEM USES THE LARGER THE NUMBER FOR THE SMALLER THE HOLE.
I'VE LISTED A NUMBER OF THESE FOR SALE RIGHT NOW AND SELLING INDIVIDUALLY.
DERBYSHIRE 10MM WITH THE RIVETT SIZES ARE HARD TO FIND.
DERBYSHIRE 10MM COLLETS ARE USUALLY INTERCHANGEABLE WITH CLEMENT 10MM LATHES.
MUCH BETTER THAN THE CHINESE BRANDS YOU FIND NOW.
THERE MAY BE SOME BLEMISHES AND TOOL MARKS ON A FEW BUT THEY HAVE GOOD KEY WAYS AND THREADS.
Just go to the size window above to choose the size you need from the drop down menu. Once the size is chosen there will be a PRICE FOR that collet.
I combine shipping and send a revised invoice for this when requested. Must be done before payment.