10pcs ER20 Spring Steel Collet Set Spring Collet Chuck for CNC Workholding Engraving Milling Lathe Tool 3mm, 1/8"/4mm/5mm/6mm, 1/4", 8mm, 10mm, 12mm,

brand new and high grade spring steel, good elasticity, high precision, stable in performance Cylinder empty slot grinding process, more suitable for high-speed processing Built in self-release design and tools will never get stuck in holder, improving work efficiency Model: ER20, Height: 30mm, Outside Diameter: 15mm, Run-Out Tolerance: <0.008mm, Range: 3mm, 1/8", 4mm, 5mm, 6mm, 1/4", 8mm, 10mm, 12mm, 1/2" Suitable for CNC milling lathe tool, work-holding engraving machine, high-speed machines and other processing

Brand: Walfront