Cast aluminum fastener for seams up to 1/2 inch in width. features one 1/4 inch bolt to anchor to seam and a 1/4 inch threaded hole on top. Comes with one FL3A loop and one 1/4 inch bolt for top mounting loop. 1 inch diameter x 1 in. (2.5 x 2.5 cm); approximately 1.6 oz. (45 g).