Abstract: An improved knife system provides for construction of wear-resistant precise coaxial alignment of pivots connecting "U"-section handle pairs to blade such that a recess in the blade can coact with a handle edge in heavy duty wirestripping without loosening the blade-to-handle pivots. In folding each of the "U"-shaped handles during construction the usual slight misalignments of blade-pivot holes in the two legs of the "U"-section of the handle caused by walking of the tapered handle blank being folded about a centerline between the blade-pivot holes, are avoided. First and second sets of holes are punched in spaced relation along the centerline at the same time as the blade pivot holes cause the handle bending to be precisely symmetrical about the centerline.

Abstract: A folding pocket tool and knife of the type having paired handles pivotal to a blade for enclosing or extending the blade depending on pivoted position has an improved implement holding tool block that passes through an implement and co-acting with this, blade centerers on each handle hold the implement centrally between them. An economical liner-free aluminum handle embodiment has reinforcement and scarring-preventing spacers adapted for press-fit assembly. Clip-on attachment and other structure provide plier sections. A container provides advantageous "T"-handle facility for boring with the system, protrusive head pivotal fasteners facilitate scraping operation, and novel storage provisions are described.

Abstract: A folding pocket tool and knife provides paired handles pivoted to swing around and be held together by a block in either the blade exposed or the folded position, doubly protrusive pivot pins at the handle free ends provide a choice of adjustable spanner wrenches; the knife blade has a tapered wrenching slot, one end-on and two offset screwdriver blades, and has also a hole for wire cutting in conjunction with jaw blades in the handles; toothed members exposed at cutouts in the handles act as jaws of nutcracker-type pliers; sockets in the free ends of the handle and in the block accept and retain standard size, standard shank punches, saws, screwdrivers, wrenches and the like; special blade and handle shapes and economy in blanking parts are also disclosed.

Abstract: A knife system with symmetrical "U"-section swing handles has a removable, integral accessory detachably force fitted to it to lock the handles together in blade-exposed or use-position, and to serve as a scraper, a pair of offset screwdrivers providing finger relief, and a grip improver. The force-fit may advantageously include three types of engagement between the lock and the handles for maximum security. The lock may be easily installed by tapping it with or against something; removal is difficult except by appropriately directed tapping.