The HEO safe door lock is made out of aluminium, with stainless steel fixtures and is very robust. You do not need to use grease to keep the door lock working. The HEO safe door lock comes with a three year guarantee. This lock can be mounted without drilling holes in the door. It is simple to fit and easy to use. Ducato/Boxer/Jumper 2007 on, with lock/keys. Drilling is necessary on this lock.