Cheek Retractor Dental Mouth Gag by Master Series
Use this unassuming looking device to spread their mouth open and give you unrestricted access. The comfortable cradles on either side slide easily over all lip sizes. Once you release this device, the U shaped support bar will push the cheeks out of the way, so they are unable to close their lips. Incredibly simple and extremely effective, this versatile piece is a unique and exciting twist on speech restriction and traditional gags.
Measurements: 4.5 inches outer width, 3.35 inside width, 3.5 inches in length