For puncture breakup a pointed chisel is therefore the instrument of choice.

For puncture breakup a pointed chisel is therefore the instrument of choice.

The invention relates to a circular-shank tool (30) comprising a tool holder (40).

Of course, a chisel is a sharp steel tool used for making a sculpture out of a hard or difficult material, like granite or marble.

The invention relates to a vulcanised punch (1) whereby both punch 1 and punch 9 comprise a surface (5 and 10) which is provided with slightly projecting elements (6 and 11) which define the small mortises of the tile.

Burin The official website for the historic Town of Burin.

Such a chisel holder (10) can be realized with a compact and stable construction in particular in that the central longitudinal axis (M) of the chisel mount (10.2) intersects the supporting surface (10.1).

headless set screw with cone point

conical pointed grub screw

headless set screw with cone point

conical pointed grub screw

end for self tapping screw

According to the invention, the play between the round shank bit (1) and bit retainer (13) and hence directly the wear on the bit retainer (13) may be minimised, whereby the retainer element (18) is made from an elastomeric material.

tapping screw type ab point

cone point end for self-tapping screw