What is the Rogue Fitness suitecase challenge?

You pickup a weighted barbell in each hand balancing them at your side and holding them for a minimum of 30 seconds. Men must use a 20KB barbell and women will use a 15KG barbell.  Not only does it test your overall strength it tests your grip strength.  Your total will be the total weight of the 2 barbells.  You are not allowed to use gloves, liquid grip, lifting straps or tape on the bar and/or fingers/hands.