Abstract: A top accessible, pivotably mounted spring assisted blade locking mechanism provides a system permitting front loading capability through an opening in the front of the knife handle and a spare blades compartment accessible through a pivotably mounted side cover along with the employment of a pivotably mounted top accessible single blade retrieval system eliminates the need to separate the two mated halves of the knife handle to effect quick and safe blade change and maintenance of the spare blades supply. The importance of ergonomics is accentuated by the strategic integration of a smooth comfortably held shape with practical access of the required functions operating mechanisms.