A table saw includes two guide bars movable along two opposite sides of a worktable to carry a table extension, and a locking mechanism for locking the guide bars in position. This casing houses a pair of electrical connectors of which a first end is in the shape of a pin housed longitudinally in one of arms, while a second end is in the shape of a sleeve housed longitudinally in the other of the arms. The stimulation electrode is useful, for example, in cardiac pacemakers, neuro-stimulation devices and other human implants.