When clamping thin plate parts with flat pliers, because the contact area between the workpiece and the jaw is relatively small, under the action of clamping force, thin plate parts will arch in the direction perpendicular to the normal of clamping force. Secondly, due to the uneven blanking surface of the thin plate blank, the clamping force of the blank in the flat pliers will be uneven, resulting in arching.

Flat-nose pliers are a general fixture, which is often used to install small castings.