Retention knobs, also known as pull studs, allows you to mount a tool holder to the machine spindle. Using a low quality retention knob can lead to poor tool life and run out, which is all of our retention knobs have threads that are rolled for strength and durability. We have standard style knobs for most machines in stock, as well as coolant thru and many special designs available and able to be shipped out same day. We are also able to manufacture special designs specific to your drawings.

Please be aware, using the incorrect retention knob for your machine may lead to personal injury, or damage to your machine spindle or tool holder. If you have any questions about the style retention knob you need, please call us at (800) 835-2643.