Features:FG (Friction Grip)Type: FG1957/FG 1958Tungsten carbide materialFor High Speed HandpieceUsed for opening the crown teethHead Diameter:FG -1957 1.0mm FG- 1958 1.2mmOverall Length:19mmPacking List:10Pcs/PackThis product may be intended for use by a health care professional use only. The seller may ask you to evidence you are a qualified health care professional entitled to buy and use such products in your country.