The SC-EM6-ER45(40) 5/8 x 5/8 from Field Tool Supply is a high-performance end mill holder designed for precision machining. This holder features a 5/8" diameter and is compatible with ER45 collets, ensuring a secure grip on cutting tools. Constructed from high-quality steel, it offers durability and stability during operation. The holder is designed to meet ANSI standards, making it suitable for professional use in CNC machining and milling applications. Its compact design allows for easy installation and removal, making it an essential tool for machinists seeking accuracy and efficiency.