Features 1、Suitable for ER type tool handle, tool bar, extension bar nut holding drill bit, boring cutter and other tools. 2、Strong clamping force, not easy to deform. 3、Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. 4、High quality material, durable and solid. 5、100% Brand New and high quality. Specification Features: 1. Suitable for ER type tool handle, tool bar, extension bar nut holding drill bit, boring cutter and other tools. 2. Strong clamping force, not easy to deform. 3. High quality material, durable and solid. 4. Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry. 5. 100% Brand New and high quality. Specification: Name: clamping nut Product features: suitable for ER type tool handle, tool bar, extension bar nut holding drill bit, boring cutter and other tools, strong holding force is not easy to deformation. Material: 42 crMo Applicable: ER11 collet, tool handle and tool lever. Type Thread of nut (mm) Outer diameter of nut (mm) Height of nut (mm) 01 M15 * 1 50 25 02 M14 * 0.75 50 25 03 M14 * 0.75 50 25 04 M13 * 0.75 50 25 Package list: 1pcs * Clamping Nut Package List