The Steinberger TransTrem, like the Floyd Rose Speedloader, requires special strings that can only be used on the TransTrem unit. However, the TransTrem had the novel design that the bar could be pushed in to "transpose" the tuning of the entire unit to various other keys. The system saw limited use (mainly due to its high price and limited string availability), although Edward Van Halen had continued to experiment with the system. Notable Van Halen songs where the TransTrem can be heard include "Get Up" and "Summer Nights", from the album "5150".