Abstract: A battery terminal clamp includes a pair of spring-loaded lever arms pivotally joined at a pivot. Each lever arm includes a handle end and a jaw end. At least one of the jaw ends has an engagement aperture for clamping onto a battery terminal. The aperture is a keyway or a fork for engaging a circumferential groove around a battery terminal. The aperture may include a relief slot for additional flex. In another embodiment, the spring-loaded battery terminal clamp is eliminated, so that only a substantially flat electrical conductor remains. The electrical conductor includes the engagement aperture near a first end and a connection for a flexible conductor at a second end. Thus, a pair of jumper cables can be manufactured where the jumper cables include no moving parts.

Abstract: A multi-purpose pliers includes a pair of lever arms pivotally joined at a pivot. Each lever arm includes a handle end and a jaw end. The jaw ends comprise a plurality of graduated engagement positions to engage a range of fastener sizes. The graduated engagement positions include a plurality of stepped flats or angled notches for square or hexagonal fasteners or other with parallel sides. The handles and jaws may be temporarily fixed into position to simulate a box end wrench with parallel jaws. The pivot includes an adjustable joint with at least two pivot positions. Each of the handle ends may include a driver tip, such as a screwdriver, concealed beneath a removable grip. The driver tips are interchangeable.