Abstract: A folding utility knife is provided that includes a blade carrier pivotably secured to a handle. The blade carrier includes a housing in which a blade pocket is formed. The blade pocket defines a top edge and an opposing blade opening; and a pair of side edges located on opposite sides of the blade pocket, extending between the top edge and the blade opening. The blade pocket also defines a pair of detents located proximate the pair of side edges, between the top edge and the blade opening, spatially separated from the top edge and the blade opening. The blade pocket is contoured to fit a top portion of a utility blade that includes a pair of openings, and the pair of detents are contoured to fit within the pair of openings to position and hold the top portion of the utility blade within the blade pocket.

Abstract: A utility blade is provided that includes a blade body having a convex quadrilateral shape. The blade body defines a top edge, a linear cutting edge on an opposite side of the blade body from the top edge, and a pair of side edges located on opposite sides of the blade body, extending between the top edge and the linear cutting edge. The blade body also defines a pair of openings located proximate the pair of side edges, between the top edge and the linear cutting edge; and the pair of openings are spatially separated from the top edge and the linear cutting edge. A top portion of the utility blade is contoured to fit within a holder that includes a pair of detents, and the pair of openings contoured to fit the pair of detents to position and hold the utility blade within the holder.