The 3-Piece Locking Pliers Set includes one 6-1/2 in. Long Nose Locking Pliers, one 7 in. Locking Pliers and one 10 in. Locking Pliers. They provide a hands free operation. They are used as a clamp to hold 2-Piece of material together until they are permanently joined, to hold materials for welding, etc. The locking device also makes it easy to hold odd shaped objects. They are a must have for any professional or Do-It-Yourselfer.