Abstract: A mechanical clamp for releaseably clamping a workpiece against a supporting surface. The clamp engages workpieces of differing thickness without adjustment and applies substantially uniform clamping force on the workpieces despite differences in thickness of the workpieces.

Abstract: A mechanical clamp for releaseably clamping a workpiece against a supporting surface. The clamp includes means for releaseably locking the clamping member in a clamping position without use of an overcenter movement of the clamp toggle links.

Abstract: A magnetic drill holder is comprised of a nonmagnetic housing and a magnetic back plate. The housing is fabricated as a series of adjoining longitudinal channels, each having one closed end. A common magnetic back plate encloses the channels longitudinally, thus forming longitudinal receptacles. The channels may be of varying lengths and areas, making them suitable for holding a series of tools, such as drill bits. Magnetic tools placed in the receptacles are retained in them by magnetic attraction. The tool holder further includes a pocket that utilizes the magnetic back plate and a housing rib to hold a selected tool, such as a drill chuck key, in the tool holder.