If you want to create a toolbar with a bunch of buttons all independent of one another, please ensure that you set the Group property of each button to something unique. If you leave the group property blank, RadToolbar considers all the buttons to belong to a single group (A blank group) and the buttons behave like Radio buttons affecting each other's toggle property.

HTH 

Hi HTH,

Actually this is the default behavior of RadToolBar buttons - when set checkable, all the buttons belong to the "empty" group and can uncheck each other.

Best regards,
Erjan Gavalji
the Telerik team