Abstract: A chalk line end is disclosed which includes a substantially flat base member having first and second tabs depending therefrom in order to form a substantially 90 degree angle to the base member. First and second points extend from the respective first and second tabs and are sized and shaped so as to press into the side surface of a board when the chalk line end is positioned over the board edge. This arrangement facilitates maintaining the position of the chalk line end as the chalk line is drawn off at an angle to the board edge. As an optional feature, a chalk line mount may be coupled to the base member by means of a swiveling connector, such as a rivet. This swiveling connection facilitates drawing the chalk line off at an angle from the board edge.

Abstract: A double-ended dual mechanism retractable blade utility knife. The knife includes two separately actuable mechanisms which allow extension and retraction of one or both blades independently of one another. The cutting surfaces of the respective blades are oriented towards opposite sides of the knife, thereby facilitating rotation of the knife within the user's hand in order to change which blade is currently being used. The independent nature of the dual mechanisms allows both of the blades to be held in the extended position. A storage area is further provided behind each of the mechanisms for the storage of spare blades.