MTA3-ER32 Milling Tool Holder - Durable high quality 40CrMn steel with a hardened taper shank for precise machining and long lasting performance in CNC milling and turning centers - High precision processing: fully hardened with a ground taper, smooth surface, and clean thread cuts for stable mounting and reliable operation in demanding milling tasks - DIN6499B compliant: roundness tolerance of only 0.012 mm, delivering high accuracy; compatible with various ER collet chucks for versatile applications - Versatile use: suitable for milling, drilling, turning, and boring machines; can replace conventional chucks and significantly improve efficiency in metalworking projects Use scenarios - In CNC milling, use to hold ER32 collets for securing end mills and drills with high rigidity and repeatable accuracy - In drilling and boring of steel or aluminum, maintain precise runout to ensure clean, accurate holes - In small to mid size workshop setups, replace bulky conventional chucks to simplify setups and speed production without sacrificing precision