Atoplee ER32 Milling Lathe Collets CNC Chuck Set,1/4 inch,1/2 inch,3/4 inch,1/8 inch,3/8 inch,5/8 inch,[All Sizes, 6pcs] Material: 45 steel Hole diameter: 1/2'' , 1/4'' ,3/4'' ,1/8'' , 3/8'' ,5/8'' Accuracy:less than 0.015Model : ER32 Height: 1.57'';Outside diameter :1.3''(32mm) Package Included: 1 x CNC ER-32 Precision Collet