Clogs are cleared with plungers through the process of water displacement. The more water pushed towards the clog per plunge determines the ability of the plunger. Standard designed rubber cup plungers displace about 2 to 4 cups of water per plunge. The bellows design Master Plunger displaces between 8 to 10 cups per plunge, depending on the model. Unique bellows delivers more plunge power per push. Nose funnel directs plunge blast down the drain not out the side of plunger. Pommel top handle you can really get a grip on. Super-strong polyethylene construction. Fits all toilet bowls.