The utility knife assembly includes a housing which extends in a longitudinal direction between opposite ends and presents an at least partially open interior. A blade with a sharp edge is fixed with the housing such that the blade extends through one of the longitudinal ends, and the blade is fixed with the housing in such a manner that it is non-movable relative to the housing. A blade protector is partially disposed in the open interior of the housing and is movable in the longitudinal direction relative to the housing between a retracted position and a covering position. In the retracted position, the sharp edge of the blade outside of the housing is exposed for cutting, and in the covering position, the sharp edge of the blade outside of the housing is covered by the blade protector.

A saw sheath is provided which allows a saw to be inserted easily and smoothly, which prevents the inserted saw from easily falling out or rattling in the sheath, and which can suppress scraping-off of the inner wall by the blade tip of the saw caught by the inner wall. Storage structures of the saw sheath and a saw are also provided. The saw sheath (1) includes a flat sheath opening section (10) and a flat main sheath body (20), and a saw blade (41) is inserted into the main sheath body (20) via the sheath opening section (10). A pair of guide rollers (12) are provided at the entrance of the sheath opening section (10), on the left and right sides in the width direction of the entrance, and a grip penetration preventing section (15) is provided in the interior of the sheath opening section (10). The space from the guide rollers (12) to the grip penetration preventing section (15) constitutes an elastic grip-fitting space (16).

A saw sheath is provided which allows a saw to be inserted easily and smoothly, which prevents the inserted saw from easily falling out or rattling in the sheath, and which can suppress scraping-off of the inner wall by the blade tip of the saw caught by the inner wall. Storage structures of the saw sheath and a saw are also provided. The saw sheath (1) includes a flat sheath opening section (10) and a flat main sheath body (20), and a saw blade (41) is inserted into the main sheath body (20) via the sheath opening section (10). A pair of guide rollers (12) are provided at the entrance of the sheath opening section (10), on the left and right sides in the width direction of the entrance, and a grip penetration preventing section (15) is provided in the interior of the sheath opening section (10). The space from the guide rollers (12) to the grip penetration preventing section (15) constitutes an elastic grip-fitting space (16).

A cutting tool with handle and a cutting member that includes a feed slot with a cutting blade and a guiding member with a discus-like shape formed by two opposing convex surfaces is provided. The cutting blade is arranged on one convex surface leading the material to be cut into the slot to the cutting blade. The tool handle extends substantially parallel with the plane containing the at least one cutting blade in order to improve the manual control of the tool by pulling or pushing.

A cutting tool with handle and a cutting member that includes a feed slot with a cutting blade and a guiding member with a discus-like shape formed by two opposing convex surfaces is provided. The cutting blade is arranged on one convex surface leading the material to be cut into the slot to the cutting blade. The tool handle extends substantially parallel with the plane containing the at least one cutting blade in order to improve the manual control of the tool by pulling or pushing.

A pizza cutter in the form of a disc having three or more edges, a series of rounded corners, equal in number to the three or more edges, which form the interfaces between adjacent edges, a handle having a proximal end and a distal end, an arm located at the proximal end of the handle, the proximal end and the distal end separated by a guard, and the disc connected to the arm.

A pizza cutter in the form of a disc having three or more edges, a series of rounded corners, equal in number to the three or more edges, which form the interfaces between adjacent edges, a handle having a proximal end and a distal end, an arm located at the proximal end of the handle, the proximal end and the distal end separated by a guard, and the disc connected to the arm.

The present invention consists on a safety protective cover for cutting tool head having a protective housing fitted to receive a sharp of the cutting tool and the rear portion has a locking mechanism fitted to be inserted inside a hole of the cutting tool. The locking mechanism has at least two locking arms capped at their end by a notch extending outwardly away from the other arm, and each arm comprises at least one rib on the inner surface thereof; and, further, the locking mechanism has a first side opening, a second side opening, a stop opening and a central opening; and comprises at least one rim on the inner surface of the central opening; The notches of the arms protrude out of the hole of the tool by a clicking sound, and a snapping key is inserted through the central opening to the inside of the arms crossing from the cover to before reaching the notches. Said snapping key is divided into a grip portion and a locking portion, wherein the locking portion has a protruding latch with respect to the bottom face of the grip portion; and the locking portion further has two or more coupling tabs, two or more guide pins and a stop pin. The snapping key is arranged to rotate from a locked position to a released position and vice versa.

The present invention consists on a safety protective cover for cutting tool head having a protective housing fitted to receive a sharp of the cutting tool and the rear portion has a locking mechanism fitted to be inserted inside a hole of the cutting tool. The locking mechanism has at least two locking arms capped at their end by a notch extending outwardly away from the other arm, and each arm comprises at least one rib on the inner surface thereof; and, further, the locking mechanism has a first side opening, a second side opening, a stop opening and a central opening; and comprises at least one rim on the inner surface of the central opening; The notches of the arms protrude out of the hole of the tool by a clicking sound, and a snapping key is inserted through the central opening to the inside of the arms crossing from the cover to before reaching the notches. Said snapping key is divided into a grip portion and a locking portion, wherein the locking portion has a protruding latch with respect to the bottom face of the grip portion; and the locking portion further has two or more coupling tabs, two or more guide pins and a stop pin. The snapping key is arranged to rotate from a locked position to a released position and vice versa.

A package opener comprises a handle having a first half and a second half. A plurality of blade cartridges are sandwiched between the first half and the second half, wherein the plurality of blade cartridges include at least one package opening blade cartridge, at least one dual blade cartridge, and at least one envelope cutting blade cartridge. The package opening blade cartridge is configured at an operative bottom end of the handle. The dual blade cartridge is configured at an operative rear end of the handle. The envelope cutting blade cartridge is configured at an operative front end of the handle.