Very similar to the classic SM58 but designed with instruments in mind. Good for snare drum, guitar amps, brass instruments, etc. Generally a very useful "general purpose" mic that will give an acceptable sound from almost anything you point it at.
(We have used SM57s on didgeridoos, toy pianos, tambourines, and someone shaking a tree branch. Although not all at the same time)
Despite being intended for instruments, the SM57 is also a very capable vocal mic. Standard issue for US presidents, as well as Lemmy from Motörhead...