steel chair frame with hole; 1.ISO9001:2008 2.customers design or sample welcome. 3.good quality,competitive price,delivery steel chair frame with hole1,materail:steel,stainless steel and other material.2,high quality contral system.3,surface treatment;powder coated.galvanize,sand coated,etc4,OEM order are welcome5,various stamping machine6,profession stamping tooling design.