●Half Couplers are used in various products like aluminum base plates or steel base plates. ●Threaded for M12 bolt includes Coupler Pin and R-Clip. ●Fits F31, F32, F33, F34 and F44P Trussing. ●1 Sets Weight ? 130g / 0.286 Lbs, About the size Please see Picture 2. ●Including 20X Half Conical Coupler ,20X Bolt,20X R Clip.