TDC Corner Crimp Tool / Transverse Connection / By Harry Thompson IV / October 22, 2018 The Value of a Corner Crimp Tool for TDC/TDF There are 3 options for securing the TDC/F Corner to the ductwork after it’s been set in place: Tinners Hammer, Crimping Tool, or a Corner machine. Hammering the TDC Flange down to secure the Corner? It can get pretty Ugly! For less than $200.00 you can do it faster and get a better looking “crimp” Duro Dyne TDC Corner Crimp Tool crimps the TDC flange over the Corner to secure it on both sides This tool crimps over the TDC/F profile so it folds over and secures the Corner Duro Dyne TDC Corner Crimp Tool Read more