iShoot All-metal Lever Quick Release Plate Clamp IS-JZ80BK Compatible with Gitzo GH1780 / 2780 / 3780 series and RRS Fit Ball Head and ARCA-SWISS Fit Quick Release Plate Made in China Aviation aluminum,weight is about 150g Self-locking lever structure,AS standard fit Compatible with quick release plate of 38mm - 40mm wide Reserved 3/8" screw hole, three M3 screw holes