KNIPEX's 10" Cobra Water Pump Pliers has a serrated gripping surface that can grip any shaped object - round, square, hex or flat. Featuring an optimized fine adjustment with 25 preset locations and a patented push-button adjustment, the Cobra will provide the professional tool user with a firm and secure grip every single time. The Cobra includes a built-in pinch guard that protects against this injury, helping users avoid blood blisters and other injuries from other types of pump pliers.