1、Nickel Plated Alloy Steel: The tool holder is made of excellent alloy steel, with nickel plated finish for rust prevention, and hard yellow coating for dust protection. 2、Good Performance: The tool holder adopts an integrated molding design, with high concentricity of the inner hole, stable processing, and low jumping force. 3、Stable Clamping: The alloy steel tool holder adopts 168 excellent rolling needles to ensure stable clamping, and greatly improve processing efficiency. 4、Good Protection: Add up and down double retaining rings design, waterproof and dustproof, avoid internal rust, knurled design provides good skid resistance. 5、Wide Application: This 90mm tool holder is compatible with various milling machines and CNC tools, is an essential tool for mechanical processing and manufacturing.