These are double sided face cutters, properly hardened and tempered. 70 / 20 Degree Bore Cutter : 1 1/4", 1 13/16", 1 3/8", 30 Degree : 1 3/4", 45 Degree : 1 1/4", 1 3/16", 1 5/16", 1 5/8", 1 7/16", 1 1/2", 1 3/4", 1 7/8".
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