LTN is composed of two basic models: LTN 621 and LTN 6221. The first model features one incoming calibrating/drip cutting unit, two incoming chamfering mandrels and six oscillating polishing mandrels for 130-mm. The first and second mandrels have a mechanical stop for diamond tools. The second model has the same composition, but is equipped with two outgoing chamfering mandrels. The base models can be enhanced by a range of options on request.