The standard series are: ER-8, ER-11, ER-16, ER-20, ER-25, ER-32, ER-40, and ER-50. The "ER" name came from an existing "E" collet (which were a letter series of names) which Rego-Fix modified and appended "R" for "Rego-Fix". The series number is the opening diameter of the tapered receptacle, in millimetres.

Your first consideration should be the size of end mills or drills you will be using most often. If you are doing smaller work you would require smaller diameter range collets. Generally you may prefer the ER16 and ER32 sizes. ​If you are doing very small work then perhaps an ER11 set would be the best choice.

Last updated on 29 Apr 2024 | 05:23 PM (IST) Segera ER 40 Tablet is a medicine used to treat and prevent gout. Gout happens when there is too much uric acid in your body and it forms into crystals that can appear around your joints leading to painful and swollen joints. This medicine helps to keep uric acid levels low.