Endo Assist Features: -Built-in millimeter gauge measures files and positions rubber stopper -Right or left hand use -Small and large rings are included to accommodate most finger sizes -Flat bottom enables the Endo Assist to stand freely on its own -Comes with 12 disposable foam inserts -Foam cleans and holds files -Designed to slide into side of the Endo Guards -Dimensions: 1-1/2" x 1-3/4" x 1-5/8" -Autoclavable up to 136°C/275°F -Contains Microban Anitimicrobial Protection