PERFECT FOR TRANSPORTING ELECTRONICS, CIRCUIT BOARDS, AND OTHER STATIC SENSITIVE MATERIALS.BRIGHT, CHROME OVER NICKEL ELECTRO PLATING CREATES A BRILLIANT HIGH GLOSS FINISH. SHELF CLIPS SNAP ON POST, ALLOWING SHELF COLLAR TO SLIDE OVER FOR A SECURE FIT. ESD CASTER TRUCKS INCLUDE 4 SHELVES, 4 POSTS, 4 SETS ALUMINUM SHELF CLIPS, 1 DRAG CHAIN, AND 4 POLYURETHANE ESD SWIVEL CASTERS, 2 WITH BRAKES.