Atoplee 1pcs 1/2" ER32 Precision Spring Collets CNC Lathe Milling Chuck Material: 45 steel Hole diameter : 1/2'' Accuracy:less than 0.015Model : ER32 Height: 1.57'';Outside diameter :1.3''(32mm) Package Included: 1 x CNC ER-32 Precision Collet