Abstract: A hand-held screwdriver assembly having interchangeable blades which are held within a hollow handle and are available to be selected and moved through a cross-slot in a cap assembly on the handle to a stop position, and then to be secured in a chuck for use. Rotation of the cap assembly is prevented when the blade is secured in the chuck, thus precluding the introduction of a second blade into the cross-slot.

Abstract: A hand-held screwdriver assembly having interchangeable blades which are held within a hollow handle and are available to be selected and moved through a cross-slot in a cap assembly on the handle to a stop position, and then to be secured in a chuck for use. Rotation of the cap assembly is prevented when the blade is secured in the chuck, thus precluding the introduction of a second blade into the cross-slot.

Abstract: A hand-held screwdriver assembly having interchangeable blades which are held within a hollow handle and are available to be selected and moved through a cross-slot in a cap assembly on the handle to a stop position, and then to be secured in a chuck for use. Rotation of the cap assembly is prevented when the blade is secured in the chuck, thus precluding the introduction of a second blade into the cross-slot.

Abstract: A tool packaging system of complementary plastic planar members snapfit together and interlocked therebetween to allow a planar assembly or a configuration akin to a toolbox. In an alternative embodiment, complementary extruded plastic planar members may be slidably engaged and snapfit to provide either a planar assembly, or rectangular prism assembly which is completed by snap-fitting end caps thereto.

Abstract: An apparatus for locking a case having a first part and a second part that close together along a first edge of the first part and a second edge of the second part, comprising a housing portion mountable in the first part adjacent the first edge, a latch portion positioned in the housing portion and capable of slidable movement within the housing portion from a first position to a second position displaced from the first position, and a biasing spring positioned between and adapted with respect to the housing portion and the latch portion to bias the latch portion into the first position. A catch is connected to the second part of the case and extends in a direction from the second edge of the second part toward the first edge of the first part.