ITEM NAME:2 Piece / Batch Precision Balance Chuck Nut a Type ER20 Spring Collection N X8G8 2 Piece / Batch Precision Balance Chuck Nut a Type ER20 Spring Collection N X8G8 Application: Milling Cutter TYPE: ER20-A CLAMPING TYPE: A model: balanced Material:40 chrome colour:black Package Contents: 2 * Precision balance chuck