If you have material of larger diameters between the centers running and you take quite a lot it often happens that the participant is slipping. There they found something at Oneway; The Big Bite Chuck Spur. This participant is mounted in the pelvis of a Talon or Stronghold chuck. Note that you put the two teeth of this large participant on the grain of the wood so that the wood will not split.
The big participant fits in all Oneway, Talon and Stronghold pelvis.