Tongue-and-Groove Pliers

Pick a size based on the jaw opening and handle length: smaller (6–8 inch) pliers suit light household tasks and tight spaces, medium (10–12 inch) for general plumbing and automotive work, and larger (14–18 inch) for heavy-duty applications where greater reach and leverage are needed

Look for pliers made from chrome vanadium or alloy steel for strength and toughness, and consider corrosion-resistant finishes such as chrome plating or black oxide if the tool will be used in wet or corrosive environments

Good features include multiple groove positions or a quick-adjust mechanism for precise jaw spacing, serrated or hardened gripping teeth for slip resistance, and ergonomic, non-slip handles to reduce hand fatigue

Keep them clean and dry after use, periodically apply light oil to the pivot and sliding surfaces to prevent rust and ensure smooth adjustment, and inspect teeth and pivot wear—replace the tool if jaws are significantly worn or damaged

Wear appropriate hand protection, position the fixed jaw toward the workpiece for better leverage, avoid using pliers as a hammer or pry bar, and do not exceed the tool’s intended size or leverage limits to prevent slippage or breakage

Brands differ in material quality, heat treatment, and warranty; higher-priced models generally offer better durability and precision. Tongue-and-groove pliers commonly range from budget options under $50 to higher-end professional tools above that level

They can be used on plumbing fittings, but to avoid marring plated or soft metal surfaces use protective pads, cloths, or specialized jaw covers and apply only the necessary force