How to replace toolbar in ckeditor

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ASP.NET

SQL

jQuery

C#3.5

C#5.0

I have multiple ckeditor in my aspx page.i wanted to remove toolbar in several ckediter in aspx page.i have only one config file in ckediter folder.when i change the config code it will effected to all ckediter.how to set a toolbar in particular ckediter?

My Congig.js Code:

CKEDITOR.editorConfig = function(config){
    config.toolbar = 'Custom';
    config.toolbar_Custom = [];
    };