RSD Technologies CAT40 retention knobs are precision-machined for secure tool retention, consistent pull force, and reliable performance in demanding CNC machining applications. Manufactured from high-strength alloy steel and heat-treated for durability, these pull studs are designed to meet industry standards for CAT40 tool holders while maintaining excellent dimensional accuracy and wear resistance. Ideal for milling, drilling, and high-speed machining operations, they provide dependable spindle engagement to reduce vibration and improve machining stability. Available in multiple thread configurations and compatible with a wide range of CNC machines, RSD Technologies CAT40 retention knobs deliver the strength, reliability, and consistency professional machinists and production shops depend on.