1 Spring Collet Precision Collet Chuck Set ER8 ER16 ER20 ER25 ER32 ER40 For CNC Engraving Machine Milling Lathe Tool Holder Short Description: Clampingforce,clampingrange,specificationscomplete,highprecision.Widelyusedinwire,milling,boring,dilling,tapping,CNC,carving,spindlemachine,suchasprocessingwork. Features: 1. Usethehighcarbonbearingsteel,heattreatedrigidityisHRC48 -50 2. ThesurfacoroughnessisbelowRZ2.5,hastwo classes'products. 3. TheinnerboreprocessingbyhighprecisiongrindingaccordingtoDINstandard. 4. Useforclampingscrewtap,drill,millingcutter, reamerandsoon. 5. Havingtensionandcompressionfunction,brilliant andchangeable. Specification: Materical: High Carbon Steel Hardness: HRC=48 -50 Note Please allow 1-3mm error due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 1 _x000D_