Universaalvääravad

Universaalvääravad, also known as universal wrenches or adjustable wrenches, are adjustable hand tools used to tighten or loosen fasteners such as bolts and nuts. Unlike fixed wrenches which are designed for specific sizes, a universalväärav has a movable jaw that can be adjusted to grip fasteners of various dimensions. This adjustability makes them a versatile tool in a mechanic's or DIYer's toolbox, reducing the need to carry a wide assortment of fixed wrenches.

The mechanism of a universalväärav typically involves a screw mechanism, often a worm gear, that moves one of the jaws in or out. This allows the user to set the opening to match the size of the fastener. They are commonly made from steel alloys for durability and strength. While convenient, it's important to note that adjustable wrenches can sometimes be less precise than a well-fitting fixed wrench, and care must be taken to ensure a snug fit to avoid damaging the fastener head. They are a staple in many tool kits due to their adaptability and cost-effectiveness.