High quality carbon steel Head is precision finishing Rubber and plastic handle 6"-150mm 8"-200mm 10"-250mm 12"-300mm Packing of 6" wrench: 5 pcs/box, 100 pcs/ctn . Cbm is 0.38*0.24*0.35, gw is 17 kg Packing of 8" wrench: 5 pcs/box, 100 pcs/ctn , cbm is 0.45*0.36*0.20, gw is 26 kg Packing of 10" wrench: 5 pcs/box, 50 pcs/ctn , cbm is 0.45*0.36*0.21, gw is 23 kg Packing of 12" wrench: 5 pcs/box, 40 pcs/ctn , cbm is 0.41*0.41*0.43, gw is 32 kg