This is a nice set of mixed American made quality tapered reamers in a wood hinged top wood case. They are a marked U.S. and have other stamped information on them, all in great shape, but used. The smallest one is 7/64 inch and is straight, along with a 7/32 and .375 inch reamer all straight not tapered. The largest is .50 inch at the small end. The others are all tapered reamers. If you need more specific sizes, we have precision tool to measure if you email your questions.