A pliers is provided, including a first member, a second member and a control assembly. The first member has a first grip portion, a first body portion and a first jaw. The first body portion has an engaging face, a slot which is disposed on the engaging face and at least one tooth row which is arranged along the slot. The second member has a second grip portion, a second body portion and a second jaw. A pivot hole is disposed in the second body portion. The control assembly has a positioning member which is movably disposed through the pivot hole and within the slot and an operation member which is rotatably connected with the second body portion. At least one position tooth is disposed on the positioning member. The positioning member is movable with the operation member.