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This is a brand new high speed steel chucking reamer.

It's 9/16 of an inch in diameter (that's 0.5625 inches).

It's a right hand spiral design with a straight shank, perfect for machine reaming operations to get a precise hole finish and size.
Made from HSS for durability and long life.

The model or part number is 551.

UPC is 728012737843.

If you need to enlarge or finish holes to an exact dimension in metal, this is your tool.

New and ready to chuck up.

4 out of 5