patentbox jointfast adjustment via button press directly on the work piecefreely adjustable, easy super fine adjustmenthigh transmission ratio for noticeable amplification of manual forcefor work pieces with parallel surfaces (nuts, screws etc.)also ideal for bending thin parallel work pieces (e.g. metal sheet)parallel jaws without profile to protect surface coated work pieces"ratchet effect" for screws by using the jaw strokeextremely resistant overall construction, high quality tempered