Apply and rotate. A metal insert allows quick and easy rotation for replacement of connected supply line nuts or tap mounted nuts. Easily turn at awkward angles and without scratching your chrome.^ Features lightweight, high strength plastic construction and durable aluminum inserts. Remove the key head by a simple match, you can use it alone, compact and lightweight, very easy to carry.^ Notches in the plastic, on both sides, are for engagement with different sized faucet nuts. This faucet wrench sets and removes plastic sink nuts and supply line nuts, as well as 7/8" and 1" hex nuts.^ The faucet and sink installation tool is a must have when replacing a faucet, as it easily fits into this narrow area. When used correctly, the tool did what it is supposed to do effectively. Suitable for supply nuts, shut-off valves, strainer baskets, nuts, faucet nuts, toilet bowls, sink, bathroom/kitchen, etc.