TOEBEHOREN VOOR EEN BOOR MET MAGNEETBASIS.

摘要

A magnet base drill having a pair of plates formed of magnetic material removably mounted on either the side walls or the bottom face of the electromagnet forming the base of the drill and adjustable thereon to contact portions of a convex support surface spaced laterally outwardly from the central lonitudinal axis of the electromagnet when the latter is positioned on the support surface.