Multi-purpose work knife

A multi-purpose work knife, comprising:

• (a) a universal elongate handle (“UEH”) extending generally upon a UEH axis, said handle having a compound, convex curvature and an assembly within, at a top surface of a first end of said UEH, for holding a UEH utility knife blade in a selectable longitudinal position defined by a cuffing edge of said UEH blade, said UEH also defining substantially oval radial cross-sections between said blade holding assembly and a second end thereof, said cross-sections defining slightly smaller radii at about a center region of said UEH, said second end comprising complemental securement means;
• and
• (b) a selectable non-universal portion (“SNP”) having a first end and a second end, said second end comprising means for selectable complemental securement to said UEH complemental securement means, said second end of said SNP having a continuity of curvature with said second end of said UEH at opposing surfaces thereof, said UEH axis passing through said complemental securement means of said surfaces of said second ends of said UEH and SNP respectively, said SNP further comprising at a first end and top surface thereof, and assembly for selectably holding a knife blade having a cutting edge projecting away from said first end of said SNP, in which said cutting edge of said SNP blade defines an angle H which intersects said axis of UEH blase, at a virtual extension external to said work knife in a range of about 20 to about 40 degrees.