Country/Region of Manufacture Korea, Republic of. SPT is an Authorized vendor of Y. Ships from Illinois er25 18pcs metric size collet set 1.0mm 16.0mm by yg1, high quality Hardened & Ground Spring Steel Set Includes (18) ER25 (RD25) Collets From 1mm to 16mm in 1mm Increments + a 1.5mm & 2.5mm Collet ER25 (RD25) Collets Collapse Approximately 1mm YG-1 Part #225000.