What type of pliers can adjust to hold various size materials?

Slip joint pliers are designed with an adjustable pivot point that allows the jaws to expand and contract, enabling them to grip various sizes of materials. This versatility makes them particularly useful in situations where you need to work with different thicknesses or types of objects, such as nuts, bolts, or pipes. The slip joint mechanism typically consists of a pivoting slide that alters the opening size, emphasizing their utility in tasks that require a firm grip on irregularly shaped items.

The other tools mentioned have specific functions: needle-nose pliers are best for reaching tight spaces, locking pliers provide a fixed grip that can hold materials tightly in place, and crescent pliers, which are adjustable but not as versatile as slip joint pliers in terms of quick size adjustments. The unique design of slip joint pliers makes them the ideal choice for handling a variety of sizes with ease.