front corner of the first frame where it meets the second frame. drive the nail through the first frame and into the second one until the nail head is flush with the front of the first frame. place the tip of a flat-head nail against the head of the finish nail, and begin to hammer it. use the flat-head nail to drive the finish nail approximately 1/4-inch into the wood. set the flat-head nail aside for further use.
line a third frame up so that it is parallel to the first frame. make sure the short side edge is flush with the front of the second frame. drive a nail through 