USED, ROCKWELL LATHE CHUCK. IT IS A MODEL 1310B. I THINK IT’S MADE BY BUCK CHUCK. THE JAWS ARE INDEPENDENT. THE MOUNT IS L-00. THERE ARE MEASUREMENTS IN THE PICTURES. LOOK AT THE PICTURES. CHECK OUT MY OTHER LISTINGS. NO WARRANTIES GIVEN OR IMPLIED. International Buyers – Please Note. I do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior.