Bit gags are fashioned in the style of a horse bit. They restrain the wearer and limit the ability for them to communicate. A bit gag serves as a symbolic representation of the wearer as being a pet of their master. Bit gags typically do not impede speech, however they will make speech less coherent. Fetish bit gags are made of silicone or rubber, and have rings or similar means of attaching the bit to a head harness, fastening the bit into the mouth. The use of bit gags in BDSM sex play are used to erotically stimulate both the master as exerting control, and the submissive as yielding control, during consentual BDSM practices.