The Briley Speed Wrench Choke Tube Wrench has aluminum fingers that accurately align the wrench inside the choke tube and hold the teeth in place. Convenient crank handle quickly spins tubes in or out.FeaturesStandard size works on all factory style 4 slot choke tubes (Does not fit Briley Thin Wall tubes or Titanium or Plasma Chokes)Thin Wall size works for Briley Thin Wall Choke Tubes (Does not fit Titanium or Plasma Chokes)