Which tool can be locked into position using an over-center action to apply a high degree of force?

Which tool can be locked into position using an over-center action to apply a high degree of force?

• A. Locking Pliers
• B. Chisel
• C. Long Nose Pliers
• D. Duck Bills

Answer: (A)

Locking pliers use an over-center mechanism that snaps into a locked position once the handles pass a certain point. The screw sets the jaw opening, and as you squeeze, the linkage shifts past the center, so the jaws latch closed and hold with a strong, maintained grip. This lets you apply a high degree of force without continuous hand pressure, which is exactly why locking pliers are used to clamp, grip, or turn stubborn parts. A chisel is a cutting tool, not a clamp. Long nose pliers can grip small items but don’t lock in place, so they require ongoing pressure. Duck bill pliers are designed for bending or gripping with a pointed or flat beak but also lack a locking latch, so they don’t hold with high force over time like locking pliers.

Locking pliers use an over-center mechanism that snaps into a locked position once the handles pass a certain point. The screw sets the jaw opening, and as you squeeze, the linkage shifts past the center, so the jaws latch closed and hold with a strong, maintained grip. This lets you apply a high degree of force without continuous hand pressure, which is exactly why locking pliers are used to clamp, grip, or turn stubborn parts.

A chisel is a cutting tool, not a clamp. Long nose pliers can grip small items but don’t lock in place, so they require ongoing pressure. Duck bill pliers are designed for bending or gripping with a pointed or flat beak but also lack a locking latch, so they don’t hold with high force over time like locking pliers.