9" rotating caulking gun 1.aluminum handle 2.quality approved ... thickness 1.2 mm, 9" big aluminum handle rotating caulking gun with high qualityIron Sheet thickness 2 mm, ... . auto-stop function- helps reduce run-on. pressure release mechanism - for single hand operation. 360 degree tube rotation capability ... gun(adhesive, sealants, fillers, etc. 9" aluminum handle rotating caulking gun for silicon