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, ... possible to continue caulking when reaching a corner. ergonomic design. lightweight construction. compatible with over 95% of cartridges ... gun(adhesive, sealants, fillers, etc. 9" aluminum handle rotating caulking gun for silicon