CAREPAIR Fit 01-13 Silverado/Sierra 1500/2500/3500 LD/HD Crew Cabw/ 4 Full Size Doors 3" S/S Side Step Rails Nerf Bar Running Boards Installation: Bolt-on To The Frame (Body) Item offered: 2pcs 3" Round Style Nerf Bars + Mounting Brackets + Installation Instruction Position: with both driver side and passenger side Material: Made from heavy duty T304 Stainless Steel Surface finish: polished