We at CCFT have been experimenting with aluminum wedges during our forcible entry classes. Although I'm not much of a trinkit guy I think the wedges are a wortwhile addition to a firefighters personal tools. The aluminum wedge allows you to maintain your purchase while forcing a door which is important, especially when operating alone. Another bonus of the aluminum wedge is the added durability which allows you to drive it into the door, expanding your gap, and creating added space for the adz end. If you are interested in purchasing an aluminum we have them & will gladly ship them to you.