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 switchblade includes a casing that defines a cavity and a blade having a cutting edge. The blade has a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside of the cavity. A spring is operably connected to the blade to bias the blade to the deployed position. An actuator extends through at least a portion of the casing and has a hold position that engages with the blade to prevent movement of the blade with respect to the casing and a release position that permits movement of the blade with respect to the casing. A safety is operably connected to the actuator and has a lock position that prevents operation of the actuator and an unlock position that permits operation of the actuator.

A switchblade includes a casing that defines a cavity and a blade having a cutting edge. The blade has a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside of the cavity. A spring is operably connected to the blade to bias the blade to the deployed position. An actuator extends through at least a portion of the casing and has a hold position that engages with the blade to prevent movement of the blade with respect to the casing and a release position that permits movement of the blade with respect to the casing. A safety is operably connected to the actuator and has a lock position that prevents operation of the actuator and an unlock position that permits operation of the actuator.

A switchblade includes a casing that defines a cavity and a blade having a cutting edge. The blade has a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside of the cavity. A spring is operably connected to the blade to bias the blade to the deployed position. An actuator extends through at least a portion of the casing and has a hold position that engages with the blade to prevent movement of the blade with respect to the casing and a release position that permits movement of the blade with respect to the casing. A safety is operably connected to the actuator and has a lock position that prevents operation of the actuator and an unlock position that permits operation of the actuator.

A switchblade includes a casing that defines a cavity and a blade having a cutting edge. The blade has a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside of the cavity. A spring is operably connected to the blade to bias the blade to the deployed position. An actuator extends through at least a portion of the casing and has a hold position that engages with the blade to prevent movement of the blade with respect to the casing and a release position that permits movement of the blade with respect to the casing. A safety is operably connected to the actuator and has a lock position that prevents operation of the actuator and an unlock position that permits operation of the actuator.

A ceramic cutting tool may include a blade body including zirconium oxide as a primary component of the blade body, wherein the blade body includes particles including any one of aluminum oxide, silicon carbide, or silicon nitride as a primary component of the particles, and wherein the blade body includes a blade part, a plurality of the particles are partially embedded and exposed on a top part of the blade part, and wherein the plurality of the particles cohere to each other to form a plurality of aggregates.

A ceramic cutting tool may include a blade body including zirconium oxide as a primary component of the blade body, wherein the blade body includes particles including any one of aluminum oxide, silicon carbide, or silicon nitride as a primary component of the particles, and wherein the blade body includes a blade part, a plurality of the particles are partially embedded and exposed on a top part of the blade part, and wherein the plurality of the particles cohere to each other to form a plurality of aggregates.

A utility knife assembly includes a case having a slot in which two blades are received. A resilient plate is secured in the slot and includes two resilient fingers to push the blades out from the slot. A switch unit is connected to the case and selectively activates either one of the two blades to be pivoted out from the slot.

A utility knife assembly includes a case having a slot in which two blades are received. A resilient plate is secured in the slot and includes two resilient fingers to push the blades out from the slot. A switch unit is connected to the case and selectively activates either one of the two blades to be pivoted out from the slot.

Herein disclosed is a novel cutting device useful for cutting asphalt shingles and other roofing products.