Drum-irin birki ne ta amfani da birki drive inji don sa birki hooves matsa birki friction sashe a cikin birki drum gefe, don haka samar da birki karfi, sa ƙafafun rage ko dakatar a cikin wani gajeren nesa kamar yadda ake bukata, don tabbatar da tafiya aminci, da kuma tabbatar da motoci ajiye motoci abin dogaro ba zai iya ta atomatik motsawa.

Drum-type brakes suna da arha kuma suna dacewa da ƙirar gargajiya. A cikin tsarin birki, saboda rawar inertia, nauyin ƙafafun gaba yawanci yana wakiltar 70% -80% na dukan nauyin motar, ƙarfin birki na gaba ya fi ƙafafun baya girma, ƙafafun baya suna taka rawar taimakon birki, don haka masana'antun motar don adana farashi, suna amfani da hanyar birki na gaba na baya. Duk da haka, ga motoci masu nauyi, saboda saurin ba yawanci ba ne sosai, ƙarfin birki na birki yana da ƙarfi fiye da birkin faifai, don haka yawancin motoci masu nauyi har yanzu suna amfani da ƙirar drum huɗu.