The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.

The knife includes a handle portion attached to a blade with a tip at its distal end. The blade comprises four surfaces that converge to form a spine and opposing cutting edges with each surface having a concave segment, a first angled segment, a flat segment, and a second angled segment as the surface extends from the spine to the edge. Similarly, the tip includes four surfaces that converge and terminate at a point, with each surface comprising only an angled segment. Optionally, the knife includes a unique safety lanyard that has two attachment points on the handle such that a closed loop is adjustably formed around the user's hand when gripping the handle, which aids in withdrawing the knife, stabilizing the user's grip, and preventing the hand from sliding forward while in use. Optionally, the knife includes a thumb plate as an additional safeguard.

A recip blade has a blade body including a cutting edge and a tang located at one end of the blade body. The tang defines an arcuate cross-sectional shape or is laminated to increase the overall thickness of the tang and, in turn, enhance the rigidity of the blade and/or reduce oscillation or whipping of the blade during cutting.

A recip blade has a blade body including a cutting edge and a tang located at one end of the blade body. The tang defines an arcuate cross-sectional shape or is laminated to increase the overall thickness of the tang and, in turn, enhance the rigidity of the blade and/or reduce oscillation or whipping of the blade during cutting.

A food slicer, which may be used for cutting a pizza with a single blade, and other food, such as pancakes, with multiple blades includes a housing configured to be gripped by a user in a first tilted orientation in which only the first rotating blade touches a work surface, and in a second level orientation, in which all three blades touch the work surface. A first rotating blade is mounted in the housing offset along a longitudinal axis from second and third rotating blades, whereby the tripod arrangement enables a steady structure during non-use, and whereby the second and third rotating blades may be lifted off of the working surface, while the first rotating blade cuts the pizza.

A food slicer, which may be used for cutting a pizza with a single blade, and other food, such as pancakes, with multiple blades includes a housing configured to be gripped by a user in a first tilted orientation in which only the first rotating blade touches a work surface, and in a second level orientation, in which all three blades touch the work surface. A first rotating blade is mounted in the housing offset along a longitudinal axis from second and third rotating blades, whereby the tripod arrangement enables a steady structure during non-use, and whereby the second and third rotating blades may be lifted off of the working surface, while the first rotating blade cuts the pizza.

A utility instrument is in the form of a cutting tool suitable for fitting onto a user's finger. The tool has a blade and a sheath, both coupled to a mounting structure. The blade and sheath are pivotable with respect to each other. A user can wear the tool on a finger about a finger joint. The user can bend the finger to set the tool to an open condition to expose the blade for use, and can stretching the finger to set the tool to a closed condition to safely shade the blade using the sheath. The tool may further have a housing for fully receiving the blade. The blade may extend out of the housing for use, and may be retracted into the housing for safety.

A modified blade or knife that fits into a utility knife for cutting metal, wood, carpet and other materials. The blade or knife uses the utility knife body as a handle for easy, quick changing of multiple cutting edges to handle jobs that require a small tool in tight spaces without the need for power. The blades come in many common styles, fine tooth for metal, rough teeth for wood and sharp rounded blades for materials like carpet.

A modified blade or knife that fits into a utility knife for cutting metal, wood, carpet and other materials. The blade or knife uses the utility knife body as a handle for easy, quick changing of multiple cutting edges to handle jobs that require a small tool in tight spaces without the need for power. The blades come in many common styles, fine tooth for metal, rough teeth for wood and sharp rounded blades for materials like carpet.

Disclosed is a scraper, a blade has at least one cutting edge, at least one of which is a multi-arc cutting edge, and the multi-arc cutting edge is a variable diameter cutting edge. In the present invention, the cutting edge of the blade is designed as a multi-arc cutting edge, which overcomes the problem in the prior art that a planar edge cannot operate in an uneven position, and the design of the multi-arc cutting edge widens the application range of a single-arc edge, thereby achieving a better cleaning effect.