Abstract: A worktable, particularly for workshops, has downwardly open, U-shaped frames for supporting a table plate. The U-shaped frames have a front frame spar, a rear frame spar and an upper transverse spar, which links the front and rear frame spars. In order to create a worktable, which can be manufactured particularly simply and inexpensively and has a particularly high stability, according to the invention, U-shaped girders are provided, which are positioned with an upwardly directed opening and are constructed for receiving and guiding the downwardly open, U-shaped frames.

Abstract: This invention relates to a support system for workplace furniture, particularly workshop furniture, with vertical girders, horizontal girders and transverse girders. In order to create a support system for workplace furniture, particularly workshop furniture, which satisfies extremely high stability demands and simultaneously ensures a variant-rich design, at least the vertical girders are formed by a cross profile, which has perpendicularly arranged profile legs. Horizontal girders, transverse girders and further furniture components can be directly or indirectly fixed by the aid of fixing blocks to the profile legs.

Abstract: Tensioning handle for a root-canalling instrument and comprising a grip (1) with an outside-threaded shank (2) at one end, an inside-threaded cap (3) that screws onto the shank, a bore (4) that extends axially through the shank and the cap, and a tensioner that surrounds a tool inserted in the bore and tightens around the shaft of the tool when the cap is screwed tight, characterized in that the tensioner comprises sleeves (10) that loosely surround the shaft (5) of the tool (6) and have opposing sloping surfaces (15 & 16) that displace them laterally when the cap is screwed on.