Combination utility knife

A retractable blade utility knife, comprising:

• a knife housing;
• a blade comprising a first portion protruding out of the knife housing when the blade is extended, the blade having a cutting surface in a lower edge;
• a rope-cutting recess for exposing a portion of the lower edge of the blade for facilitating rope cutting by the blade irrespective of whether the blade is extended or retracted;
• and
• a pencil sharpening slot receiving a second portion of the blade for facilitating a sharpening operation of a marking instrument, wherein the pencil sharpening slot is disposed between a first wall and a second wall of a conical bore that receives the marking instrument.

A retractable blade utility knife, comprising:

• a knife housing;
• a retractable blade comprising a first portion protruding out of the knife housing when the blade is extended, the retractable blade having a cutting surface in a lower edge;
• and
• a pencil sharpening slot receiving a second portion of the retractable blade for facilitating a sharpening operation of a marking instrument, wherein the pencil sharpening slot is disposed between a first wall and a second wall of a conical bore that receives the marking instrument.

A retractable blade utility knife, comprising:

• a knife housing;
• a blade having an upper edge and lower edge, the lower edge forming a cutting surface;
• a pencil sharpening slot for facilitating a sharpening operation of a marking instrument, the slot being positioned for sharpening a pencil by using the blade;
• a pencil housing formed in the knife housing for housing a marking instrument;
• a blade carrier for carrying the blade back and forth, the blade carrier sliding along a longitudinal axis of a carrier groove formed in one side of the knife housing;
• and
• a rear cover of the knife having a pencil inlet hole and a rear cover fixed switch, the rear cover releasably coupled to a rear portion of the knife housing via the rear cover fixed switch, thereby providing a pencil chip storage room.