The RAU Drip Edge Seamer is used to lock the panel at the drip edge resulting in a clean-looking hemmed panel edge. The tool is often used in conjunctions with the RAU Eaves Edger to complete locking the panel at the drip edge. The panel edge must be bent approx. 90? for this Eaves Seam Locker to perform crimp. It is also used for forming the final lock for dormer windows. Faster and tighter crimp than the hand seamers.