SE. The dormakaba (formerly known as Dorma) TS68 is a low-cost door closer which can be universally fitted on all common door types. This unit is particularly easy and quick to install, and does not have to be mounted on a backplate. The closer arm’s power shoe and changes in templating allow simple selection of the closing force to suit various door sizes. The dormakaba TS68 door closer is the ideal low-cost solution for standard doors.. Low-cost solution for standard doors. Suitable for standard, parallel arm and frame installation. Adjustable closing speed in two independent ranges. Optional hold-open function