Kalmar "snaffle bit" tana nufin wani nau'in bit da ake amfani da shi wajen hawan doki wanda ke da aiki mai sauƙi, kai tsaye a bakin dokin kuma yawanci ana amfani da shi don hawan doki da horo. Abun snaffle yana da madaidaicin sanda ko maɗaɗɗen bakin magana wanda ke zaune a bakin doki, da zobba biyu a kowane gefe waɗanda ake manne da reins ta ciki. Lokacin da mahayin ya ja ragamar ragamar, ɗan yakan matsa lamba ga bakin dokin, wanda ke nuna alamar ya rage ko tsayawa. Kalmar “snaffle” tana nufin gaskiyar cewa bitar tana yin matsi daidai-wa-daida a bangarorin biyu na bakin doki, kuma ba ya haifar da abin dogaro ko ƙara matsa lamba a gefe ɗaya.