Abstract: A bicycle pedal has two opposed bilaterally symmetric tracks which are substantially identical. Each track is bounded by an axially disposed central concave surface and two substantially parallel apposed side surfaces. Each side surface extends inward, in equidistant juxtaposition with the central convex surface. Each track is slightly wider at the free end of the pedal than the end fixed to the crank arm. A shoe cleat has a bottom with a longitudinally disposed central concave surface and adjacent flat lateral surfaces as well as upper bilateral cleat side surfaces. The bottom central concave and two upper bilateral surfaces mate with the corresponding pedal track surfaces in an engagement parallel to the pedal axis. Attached to the free end of the pedal is a lead which has an exterior flush with the central convex surfaces of both pedal tracks. The lead tapers bilaterally into fins lying in front of the area between the two opposed pedal tracks.

Abstract: A bicycle pedal has two opposed tracks defined by a set of longitudinally contiguous surfaces. Each track is bilaterally symmetric with a central convex surface, two adjacent co-planar surfaces and two perpendicular side surfaces. Each side surface extends dihedrally inward, above a co-planar surface. Each track is slightly wider at the free end of the pedal than the end fixed to the crank arm. A shoe cleat has a bottom central concave surface, adjacent co-planar surfaces and side diheral surfaces which mate with the corresponding pedal track surfaces in longitudinal engagement. A fully sculptured lead is attached to the free end of the pedal which has an exterior flush with the central convex surface and adjacent co-planar surfaces of both pedal tracks. The lead tapers axially to an apex co-linear with the longitudinal axis of the pedal and approximates an oblate half ellipsoid about this axis with fins lying between and in front of the opposed pedal tracks.

Abstract: A wrench possessing a body situated at the juncture of two perpendicularly disposed handles each extending along a longitudinal axis lying within a fiducial plane is given. The body possesses a plurality of open cavities, each presenting a hexagonal aperture normal a central axis. Two blind cavities have central axes within the fiducial plane, opening opposite the handle side. One cavity is through the body, with a central axis normal the fiducial plane, has stepped walls and presents two opposed hexagonal apertures. Each aperture is of a different size. Each handle has one free end of hexagonal cross section normal the longitudinal axis of that handle. The two ends are of different size. A plurality of hexagonal engagements, both male and female, each affording full perimeter contact with a workpiece is thus enabled by a single tool.