3M Roof Ditch Application Tool 420A is used in the application of Roof Ditch Clips with 3M Structural Bonding Tape 9259Designed to improve automotive plant productivity, Roof Ditch Clips with 3M Structural Bonding Tape feature plastic or metal roof ditch clips pre-taped and ready for long-term application. It features 3M Structural Bonding Tape 9259, developed specifically for plastic or metal mechanical clips to e-coat, sealer or primer. This combination of tape and roof ditch clip eliminates the need to apply additional adhesive or tape to the clip before application.