Features 1、Made of high grade specially formulated spring steel 2、Hardened and precision ground 3、Built in self-release design and tools will never get stuck in holder 4、Big clamping force and wide clamping range 5、Widely used in machining centers,general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing Specification Features: 1. Made of high grade specially formulated spring steel. 2. Hardened and precision ground. 3. Built in self-release design and tools will never get stuck in holder. 4. Big clamping force and wide clamping range. 5. Widely used in machining centers,general milling machines, CNC milling machine, engraving machine, high-speed machines, and other processing. Specifications: Color/Style: ER25 Material: High Grade 65Mn spring steel Total height: 34mm/1.1inch Outer diameter(Max): 26mm/0.63inch Run-Out Tolerance: <0.008mm Gripping Range: 2MM to 16MM Package Include: 1 * Set of ER25 Collets (15pcs) Package List