BMachine 4-5mm Clamping Range Spring Collet Chuck ER16-5 ReviewbP PP Machine 4-5mm Clamping Range Spring Collet Chuck ER16-5 PProduct Name : Spring Collet;Model No. : ER16-5PClamping Range : 4-5mm 0.157"-0.17";Clamping Diameter : 5mm 0.17"POverall Size : 16 x 27mm 0.63" x 1.