Simpson THAC422 2 Double 4x22 Adjustable Concealed Hanger Galvanized Hip Connector 11 Countersink for 4 Flute 11 Countersink for 4 Flute Drills by CMT is a precision carbide tipped countersink designed to pair with 4 flute drill configurations Helical Wall Tie is a Type 304 stainless steel helical tie engineered to anchor building facades to structural members or to stabilize and reinforce brick walls The Simpson THAC422 2 Galvanized Adjustable Concealed Flange Truss Hanger for Double 4x22 is a heavy duty wood connector from Simpson engineered to support trusses and beams in wood framing systems Concealed flanges keep the hanger profile low in tight or restricted spaces where exposed flanges would interfere with adjacent framing members or finished surfaces