Drill and or chisel has cylindrical insertion end, shaft, elongated cavity, flange, and recess

摘要

A cylindrical insertion end (4) is joined to the shaft (2 of the drill and or chisel. The insertion end has at least one elongated cavity (5-8) open towards the free end and towards its outer contour. A flange (3) between the shaft and the insertion end extends at least partly round the tool (1) and protrudes radially beyond the shaft and insertion end at least in parts. The recess has a part-circular cross-sectional surface extending at right angles to the center lengthwise axis of the tool and widening towards the outer contour.