Abstract: A utility knife includes a handle, a blade holder assembly, and a clamp assembly. The blade holder assembly is constructed and arranged to hold a blade at a position of use at one end of the handle. The clamp assembly is constructed and arranged to move between a clamp position wherein the clamp assembly applies a clamp force to side surfaces the blade and a release position wherein the clamp assembly releases the clamping force.

Abstract: A utility knife includes a handle, a blade holder assembly, and a resilient blade wiper. The handle includes an opening at a front end. The blade holder assembly is constructed and arranged to hold a blade at a position of use wherein the blade projects through the opening at the front end of the handle, and to retract the blade into the handle. The resilient blade wiper is constructed and arranged to be positioned toward the front end of the handle. The blade wiper is constructed and arranged to remove debris from side surfaces of the blade when the blade is retracted into the handle.

Abstract: A knife includes a body, a retractable blade slider, a blade snapper, and a manually engageable lock. The retractable blade slider is constructed and arranged to position a multi-blade blade assembly at a position of use wherein at least a forward most blade projects through an opening at one end of the body, and to retract the blade assembly into the body. The blade snapper is removably locked to the body. The blade snapper is constructed and arranged snap-off at least one or more blades from the blade assembly. The manually engageable lock is constructed and arranged to move between a lock position and an unlock position, wherein the movement of the manually engageable lock to the unlock position releases the blade snapper from the body.

Abstract: A utility knife includes a handle, a blade holder assembly, and a clamp assembly. The blade holder assembly is constructed and arranged to hold a blade at a position of use at one end of the handle. The clamp assembly is constructed and arranged to move between a clamp position wherein the clamp assembly applies a clamp force to side surfaces the blade and a release position wherein the clamp assembly releases the clamping force.

Abstract: A knife includes a body, a retractable blade slider, a blade snapper, and a manually engageable lock. The retractable blade slider is constructed and arranged to position a multi-blade blade assembly at a position of use wherein at least a forward most blade projects through an opening at one end of the body, and to retract the blade assembly into the body. The blade snapper is removably locked to the body. The blade snapper is constructed and arranged snap-off at least one or more blades from the blade assembly. The manually engageable lock is constructed and arranged to move between a lock position and an unlock position, wherein the movement of the manually engageable lock to the unlock position releases the blade snapper from the body.

Abstract: A utility knife includes a handle, a blade holder assembly, and a resilient blade wiper. The handle includes an opening at a front end. The blade holder assembly is constructed and arranged to hold a blade at a position of use wherein the blade projects through the opening at the front end of the handle, and to retract the blade into the handle. The resilient blade wiper is constructed and arranged to be positioned toward the front end of the handle. The blade wiper is constructed and arranged to remove debris from side surfaces of the blade when the blade is retracted into the handle.