Last week I bought a set of collets and R8 chuck at a garage sale. Just for fun I have attempted to identify these. They look just like EM collets from pictures in tool catalogs and here on the internet. The size charts I have found do NOT match the collets that I have. My collets measure 45.12 mm long and 23.97 mm across the largest part of the diameter. This set was purchased from Harbor Freight originally. Any ideas??? JIM