Retention Knobs

Retention knobs for rotary toolholders thread into the shank of tapered toolholders to create a pull stud for a milling machine's drawbar to grab. They make it possible to properly place and hold the toolholder in the spindle bore. Before causing harm to the toolholder or spindle bore, these knobs are used to replace stripped or deformed retention knobs. They're made to fit specific spindle diameters and tapers.