120 Scaffolding Gravity Locking Pins Pig Tail lock Pins G pins Scaffold CBM1290 Free Shipping Free Shipping Free Shipping Free Shipping Free Shipping 120 Scaffolding Gravity Locking Pins Pig Tail lock Pins G pins Scaffold. Will fit on 1.69" and 1.625" OD Scaffolding or Fit up to 1 3/4" Diameter pipes. IF YOU HAVE ANY QUESTIONS PLEASE CLICK ON (CBM1290) then RETURNS.