SHINA Super Precision 9 PCS 1/8"-3/8" ER16 ER-16 Collects Set With 3/16 1/4 5/16 ---Material:High Grade 1065 Carbon Steel ---Condition: Brand New and High Quality ---High Accuracy and Ease of Operation. ---Run-Out Tolerance:0.015MM(0.0006") ---Gripping Range: 1/8" to 3/8"(1/8",5/32", 3/16",7/32"17/64",9/32"5/16",11/32",3/8")