Use these Shadow Alloy if you are having trouble keeping the lifespan of your plastic/rubber barends up to your expectations.
Two things make these barends live longer than most regular ones. First of is the fact that they are made of aluminium which is more durable than plastic. Furthermore, you can tighten them securely in place with the wedge-shaped inserts that fit with most bars. They are held in place with a flush mounted Allen bolt.