ARIES 204054 2 3 Inch Round Polished Stainless Steel Nerf Bars, Select Chevrolet Silverado, GMC Sierra 1500 Extended Cab Leveling Fits select Chevy GMC distribution Fits select Chevy GMC short bed trucks with puck system (year range specific) Quarter turn anchoring system provides quick installation and removal Adjustable anchors to eliminate chucking between the legs and under bed platform R16 5th wheel roller #16560 provides 12" of travel in the truck bed Lockable handle self resets to the ready to couple position after uncoupling Cast yoke with poly torsion inserts to suppress shock loads and reduce noise Fully articulating torsion head for controlled coupling and stable towing High strength It also features a dust cover to protect from dirt heavy wall tube design It begins with a one piece frame of 1 4" thick welded plates and 1 1 2" mandrel bent tubing for a solid build